chrome: Support customization of context menus (see issue #2969)

BUILD.gn

@@ -461,6 +461,8 @@ static_library("libcef_static") {
     "libcef/browser/chrome/chrome_browser_main_extra_parts_cef.h",
     "libcef/browser/chrome/chrome_content_browser_client_cef.cc",
     "libcef/browser/chrome/chrome_content_browser_client_cef.h",
+    "libcef/browser/chrome/chrome_context_menu_handler.cc",
+    "libcef/browser/chrome/chrome_context_menu_handler.h",
     "libcef/browser/chrome_crash_reporter_client_stub.cc",
     "libcef/browser/context.cc",
     "libcef/browser/context.h",
@@ -637,6 +639,8 @@ static_library("libcef_static") {
     "libcef/browser/scheme_impl.cc",
     "libcef/browser/server_impl.cc",
     "libcef/browser/server_impl.h",
+    "libcef/browser/simple_menu_model_impl.cc",
+    "libcef/browser/simple_menu_model_impl.h",
     "libcef/browser/speech_recognition_manager_delegate.cc",
     "libcef/browser/speech_recognition_manager_delegate.h",
     "libcef/browser/ssl_host_state_delegate.cc",

libcef/browser/chrome/chrome_browser_main_extra_parts_cef.cc

@@ -4,6 +4,7 @@
 
 #include "libcef/browser/chrome/chrome_browser_main_extra_parts_cef.h"
 
+#include "libcef/browser/chrome/chrome_context_menu_handler.h"
 #include "libcef/browser/context.h"
 #include "libcef/browser/net/chrome_scheme_handler.h"
 
@@ -34,4 +35,5 @@ void ChromeBrowserMainExtraPartsCef::PreMainMessageLoopRun() {
        base::TaskShutdownBehavior::BLOCK_SHUTDOWN, base::MayBlock()});
 
   scheme::RegisterWebUIControllerFactory();
+  context_menu::RegisterMenuCreatedCallback();
 }

libcef/browser/chrome/chrome_context_menu_handler.cc

@@ -0,0 +1,207 @@
+// Copyright (c) 2021 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that can
+// be found in the LICENSE file.
+
+#include "libcef/browser/chrome/chrome_context_menu_handler.h"
+
+#include "libcef/browser/browser_host_base.h"
+#include "libcef/browser/context_menu_params_impl.h"
+#include "libcef/browser/simple_menu_model_impl.h"
+
+#include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
+
+namespace context_menu {
+
+namespace {
+
+// Lifespan is controlled by RenderViewContextMenu.
+class CefContextMenuObserver : public RenderViewContextMenuObserver,
+                               public CefSimpleMenuModelImpl::StateDelegate {
+ public:
+  CefContextMenuObserver(RenderViewContextMenu* context_menu,
+                         CefRefPtr<CefBrowserHostBase> browser,
+                         CefRefPtr<CefContextMenuHandler> handler)
+      : context_menu_(context_menu), browser_(browser), handler_(handler) {}
+
+  // RenderViewContextMenuObserver methods:
+
+  void InitMenu(const content::ContextMenuParams& params) override {
+    params_ = new CefContextMenuParamsImpl(
+        const_cast<content::ContextMenuParams*>(&context_menu_->params()));
+    model_ = new CefSimpleMenuModelImpl(
+        const_cast<ui::SimpleMenuModel*>(&context_menu_->menu_model()),
+        context_menu_, this, /*is_owned=*/false, /*is_popup=*/false);
+
+    handler_->OnBeforeContextMenu(browser_, GetFrame(), params_, model_);
+  }
+
+  bool IsCommandIdSupported(int command_id) override {
+    // Always claim support for the reserved user ID range.
+    if (command_id >= MENU_ID_USER_FIRST && command_id <= MENU_ID_USER_LAST)
+      return true;
+
+    // Also claim support in specific cases where an ItemInfo exists.
+    return GetItemInfo(command_id) != nullptr;
+  }
+
+  // Only called if IsCommandIdSupported() returns true.
+  bool IsCommandIdEnabled(int command_id) override {
+    // Always return true to use the SimpleMenuModel state.
+    return true;
+  }
+
+  // Only called if IsCommandIdSupported() returns true.
+  bool IsCommandIdChecked(int command_id) override {
+    auto* info = GetItemInfo(command_id);
+    return info ? info->checked : false;
+  }
+
+  // Only called if IsCommandIdSupported() returns true.
+  bool GetAccelerator(int command_id, ui::Accelerator* accel) override {
+    auto* info = GetItemInfo(command_id);
+    if (info && info->accel) {
+      *accel = *info->accel;
+      return true;
+    }
+    return false;
+  }
+
+  void CommandWillBeExecuted(int command_id) override {
+    if (handler_->OnContextMenuCommand(browser_, GetFrame(), params_,
+                                       command_id, EVENTFLAG_NONE)) {
+      // Create an ItemInfo so that we get the ExecuteCommand() callback
+      // instead of the default handler.
+      GetOrCreateItemInfo(command_id);
+    }
+  }
+
+  // Only called if IsCommandIdSupported() returns true.
+  void ExecuteCommand(int command_id) override {
+    auto* info = GetItemInfo(command_id);
+    if (info) {
+      // In case it was added in CommandWillBeExecuted().
+      MaybeDeleteItemInfo(command_id, info);
+    }
+  }
+
+  void OnMenuClosed() override {
+    handler_->OnContextMenuDismissed(browser_, GetFrame());
+    model_->Detach();
+
+    // Clear stored state because this object won't be deleted until a new
+    // context menu is created or the associated browser is destroyed.
+    browser_ = nullptr;
+    handler_ = nullptr;
+    params_ = nullptr;
+    model_ = nullptr;
+    iteminfomap_.clear();
+  }
+
+  // CefSimpleMenuModelImpl::StateDelegate methods:
+
+  void SetChecked(int command_id, bool checked) override {
+    // No-op if already at the default state.
+    if (!checked && !GetItemInfo(command_id))
+      return;
+
+    auto* info = GetOrCreateItemInfo(command_id);
+    info->checked = checked;
+    if (!checked)
+      MaybeDeleteItemInfo(command_id, info);
+  }
+
+  void SetAccelerator(int command_id,
+                      base::Optional<ui::Accelerator> accel) override {
+    // No-op if already at the default state.
+    if (!accel && !GetItemInfo(command_id))
+      return;
+
+    auto* info = GetOrCreateItemInfo(command_id);
+    info->accel = accel;
+    if (!accel)
+      MaybeDeleteItemInfo(command_id, info);
+  }
+
+ private:
+  struct ItemInfo {
+    ItemInfo() {}
+
+    bool checked = false;
+    base::Optional<ui::Accelerator> accel;
+  };
+
+  ItemInfo* GetItemInfo(int command_id) {
+    auto it = iteminfomap_.find(command_id);
+    if (it != iteminfomap_.end()) {
+      return &it->second;
+    }
+    return nullptr;
+  }
+
+  ItemInfo* GetOrCreateItemInfo(int command_id) {
+    if (auto info = GetItemInfo(command_id))
+      return info;
+
+    auto result = iteminfomap_.insert(std::make_pair(command_id, ItemInfo()));
+    return &result.first->second;
+  }
+
+  void MaybeDeleteItemInfo(int command_id, ItemInfo* info) {
+    // Remove if all info has reverted to the default state.
+    if (!info->checked && !info->accel) {
+      auto it = iteminfomap_.find(command_id);
+      iteminfomap_.erase(it);
+    }
+  }
+
+  CefRefPtr<CefFrame> GetFrame() const {
+    CefRefPtr<CefFrame> frame;
+
+    // May return nullptr if the frame is destroyed while the menu is pending.
+    auto* rfh = context_menu_->GetRenderFrameHost();
+    if (rfh) {
+      frame = browser_->GetFrameForHost(rfh);
+    }
+    if (!frame) {
+      frame = browser_->GetMainFrame();
+    }
+    return frame;
+  }
+
+  RenderViewContextMenu* const context_menu_;
+  CefRefPtr<CefBrowserHostBase> browser_;
+  CefRefPtr<CefContextMenuHandler> handler_;
+  CefRefPtr<CefContextMenuParams> params_;
+  CefRefPtr<CefSimpleMenuModelImpl> model_;
+
+  // Map of command_id to ItemInfo.
+  using ItemInfoMap = std::map<int, ItemInfo>;
+  ItemInfoMap iteminfomap_;
+
+  DISALLOW_COPY_AND_ASSIGN(CefContextMenuObserver);
+};
+
+std::unique_ptr<RenderViewContextMenuObserver> MenuCreatedCallback(
+    RenderViewContextMenu* context_menu) {
+  auto browser = CefBrowserHostBase::GetBrowserForContents(
+      context_menu->source_web_contents());
+  if (browser) {
+    if (auto client = browser->GetClient()) {
+      if (auto handler = client->GetContextMenuHandler()) {
+        return std::make_unique<CefContextMenuObserver>(context_menu, browser,
+                                                        handler);
+      }
+    }
+  }
+
+  return nullptr;
+}
+
+}  // namespace
+
+void RegisterMenuCreatedCallback() {
+  RenderViewContextMenu::RegisterMenuCreatedCallback(
+      base::BindRepeating(&MenuCreatedCallback));
+}
+
+}  // namespace context_menu

libcef/browser/chrome/chrome_context_menu_handler.h

@@ -0,0 +1,16 @@
+// Copyright (c) 2021 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that can
+// be found in the LICENSE file.
+
+#ifndef CEF_LIBCEF_BROWSER_CHROME_CHROME_CONTEXT_MENU_HANDLER_H_
+#define CEF_LIBCEF_BROWSER_CHROME_CHROME_CONTEXT_MENU_HANDLER_H_
+#pragma once
+
+namespace context_menu {
+
+// Register the context menu created callback.
+void RegisterMenuCreatedCallback();
+
+}  // namespace context_menu
+
+#endif  // CEF_LIBCEF_BROWSER_CHROME_CHROME_CONTEXT_MENU_HANDLER_H_

libcef/browser/simple_menu_model_impl.cc

@@ -0,0 +1,529 @@
+// Copyright (c) 2021 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "libcef/browser/simple_menu_model_impl.h"
+
+#include <vector>
+
+#include "libcef/browser/thread_util.h"
+#include "libcef/common/task_runner_impl.h"
+
+namespace {
+
+// Value based on the documentation on SimpleMenuModel::GetIndexOfCommandId().
+const int kInvalidIndex = -1;
+const int kInvalidCommandId = -1;
+const int kInvalidGroupId = -1;
+
+cef_menu_item_type_t GetCefItemType(ui::MenuModel::ItemType type) {
+  switch (type) {
+    case ui::MenuModel::TYPE_COMMAND:
+      return MENUITEMTYPE_COMMAND;
+    case ui::MenuModel::TYPE_CHECK:
+      return MENUITEMTYPE_CHECK;
+    case ui::MenuModel::TYPE_RADIO:
+      return MENUITEMTYPE_RADIO;
+    case ui::MenuModel::TYPE_SEPARATOR:
+      return MENUITEMTYPE_SEPARATOR;
+    case ui::MenuModel::TYPE_SUBMENU:
+      return MENUITEMTYPE_SUBMENU;
+    default:
+      return MENUITEMTYPE_NONE;
+  }
+}
+
+}  // namespace
+
+CefSimpleMenuModelImpl::CefSimpleMenuModelImpl(
+    ui::SimpleMenuModel* model,
+    ui::SimpleMenuModel::Delegate* delegate,
+    StateDelegate* state_delegate,
+    bool is_owned,
+    bool is_submenu)
+    : supported_thread_id_(base::PlatformThread::CurrentId()),
+      model_(model),
+      delegate_(delegate),
+      state_delegate_(state_delegate),
+      is_owned_(is_owned),
+      is_submenu_(is_submenu) {
+  DCHECK(model_);
+  DCHECK(delegate_);
+  DCHECK(state_delegate_);
+}
+
+CefSimpleMenuModelImpl::~CefSimpleMenuModelImpl() {
+  // Detach() must be called before object destruction.
+  DCHECK(!model_);
+  DCHECK(submenumap_.empty());
+}
+
+void CefSimpleMenuModelImpl::Detach() {
+  DCHECK(VerifyContext());
+
+  if (!submenumap_.empty()) {
+    auto it = submenumap_.begin();
+    for (; it != submenumap_.end(); ++it) {
+      it->second->Detach();
+    }
+    submenumap_.clear();
+  }
+
+  if (is_owned_)
+    delete model_;
+  model_ = nullptr;
+}
+
+bool CefSimpleMenuModelImpl::IsSubMenu() {
+  if (!VerifyContext())
+    return false;
+  return is_submenu_;
+}
+
+bool CefSimpleMenuModelImpl::Clear() {
+  if (!VerifyContext())
+    return false;
+
+  model_->Clear();
+  return true;
+}
+
+int CefSimpleMenuModelImpl::GetCount() {
+  if (!VerifyContext())
+    return 0;
+
+  return model_->GetItemCount();
+}
+
+bool CefSimpleMenuModelImpl::AddSeparator() {
+  if (!VerifyContext())
+    return false;
+
+  model_->AddSeparator(ui::NORMAL_SEPARATOR);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::AddItem(int command_id, const CefString& label) {
+  if (!VerifyContext())
+    return false;
+
+  model_->AddItem(command_id, label);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::AddCheckItem(int command_id,
+                                          const CefString& label) {
+  if (!VerifyContext())
+    return false;
+
+  model_->AddCheckItem(command_id, label);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::AddRadioItem(int command_id,
+                                          const CefString& label,
+                                          int group_id) {
+  if (!VerifyContext())
+    return false;
+
+  model_->AddRadioItem(command_id, label, group_id);
+  return true;
+}
+
+CefRefPtr<CefMenuModel> CefSimpleMenuModelImpl::AddSubMenu(
+    int command_id,
+    const CefString& label) {
+  if (!VerifyContext())
+    return nullptr;
+
+  auto new_menu = CreateNewSubMenu(nullptr);
+  model_->AddSubMenu(command_id, label, new_menu->model());
+  return new_menu;
+}
+
+bool CefSimpleMenuModelImpl::InsertSeparatorAt(int index) {
+  if (!VerifyContext())
+    return false;
+
+  model_->InsertSeparatorAt(index, ui::NORMAL_SEPARATOR);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::InsertItemAt(int index,
+                                          int command_id,
+                                          const CefString& label) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->InsertItemAt(index, command_id, label);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::InsertCheckItemAt(int index,
+                                               int command_id,
+                                               const CefString& label) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->InsertCheckItemAt(index, command_id, label);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::InsertRadioItemAt(int index,
+                                               int command_id,
+                                               const CefString& label,
+                                               int group_id) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->InsertRadioItemAt(index, command_id, label, group_id);
+  return true;
+}
+
+CefRefPtr<CefMenuModel> CefSimpleMenuModelImpl::InsertSubMenuAt(
+    int index,
+    int command_id,
+    const CefString& label) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return nullptr;
+
+  auto new_menu = CreateNewSubMenu(nullptr);
+  model_->InsertSubMenuAt(index, command_id, label, new_menu->model());
+  return new_menu;
+}
+
+bool CefSimpleMenuModelImpl::Remove(int command_id) {
+  return RemoveAt(GetIndexOf(command_id));
+}
+
+bool CefSimpleMenuModelImpl::RemoveAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  auto* sub_menu =
+      static_cast<ui::SimpleMenuModel*>(model_->GetSubmenuModelAt(index));
+  if (sub_menu) {
+    auto it = submenumap_.find(sub_menu);
+    if (it != submenumap_.end()) {
+      it->second->Detach();
+      submenumap_.erase(it);
+    }
+  }
+
+  model_->RemoveItemAt(index);
+  return true;
+}
+
+int CefSimpleMenuModelImpl::GetIndexOf(int command_id) {
+  if (!VerifyContext())
+    return kInvalidIndex;
+
+  return model_->GetIndexOfCommandId(command_id);
+}
+
+int CefSimpleMenuModelImpl::GetCommandIdAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return kInvalidCommandId;
+
+  return model_->GetCommandIdAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetCommandIdAt(int index, int command_id) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+CefString CefSimpleMenuModelImpl::GetLabel(int command_id) {
+  return GetLabelAt(GetIndexOf(command_id));
+}
+
+CefString CefSimpleMenuModelImpl::GetLabelAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return CefString();
+
+  return model_->GetLabelAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetLabel(int command_id, const CefString& label) {
+  return SetLabelAt(GetIndexOf(command_id), label);
+}
+
+bool CefSimpleMenuModelImpl::SetLabelAt(int index, const CefString& label) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->SetLabel(index, label);
+  return true;
+}
+
+CefSimpleMenuModelImpl::MenuItemType CefSimpleMenuModelImpl::GetType(
+    int command_id) {
+  return GetTypeAt(GetIndexOf(command_id));
+}
+
+CefSimpleMenuModelImpl::MenuItemType CefSimpleMenuModelImpl::GetTypeAt(
+    int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return MENUITEMTYPE_NONE;
+
+  return GetCefItemType(model_->GetTypeAt(index));
+}
+
+int CefSimpleMenuModelImpl::GetGroupId(int command_id) {
+  return GetGroupIdAt(GetIndexOf(command_id));
+}
+
+int CefSimpleMenuModelImpl::GetGroupIdAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return kInvalidGroupId;
+
+  return model_->GetGroupIdAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetGroupId(int command_id, int group_id) {
+  return SetGroupIdAt(GetIndexOf(command_id), group_id);
+}
+
+bool CefSimpleMenuModelImpl::SetGroupIdAt(int index, int group_id) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+CefRefPtr<CefMenuModel> CefSimpleMenuModelImpl::GetSubMenu(int command_id) {
+  return GetSubMenuAt(GetIndexOf(command_id));
+}
+
+CefRefPtr<CefMenuModel> CefSimpleMenuModelImpl::GetSubMenuAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return nullptr;
+
+  auto* sub_model =
+      static_cast<ui::SimpleMenuModel*>(model_->GetSubmenuModelAt(index));
+  auto it = submenumap_.find(sub_model);
+  if (it != submenumap_.end())
+    return it->second;
+  return CreateNewSubMenu(sub_model);
+}
+
+bool CefSimpleMenuModelImpl::IsVisible(int command_id) {
+  return IsVisibleAt(GetIndexOf(command_id));
+}
+
+bool CefSimpleMenuModelImpl::IsVisibleAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  return model_->IsVisibleAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetVisible(int command_id, bool visible) {
+  return SetVisibleAt(GetIndexOf(command_id), visible);
+}
+
+bool CefSimpleMenuModelImpl::SetVisibleAt(int index, bool visible) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->SetVisibleAt(index, visible);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::IsEnabled(int command_id) {
+  return IsEnabledAt(GetIndexOf(command_id));
+}
+
+bool CefSimpleMenuModelImpl::IsEnabledAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  return model_->IsEnabledAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetEnabled(int command_id, bool enabled) {
+  return SetEnabledAt(GetIndexOf(command_id), enabled);
+}
+
+bool CefSimpleMenuModelImpl::SetEnabledAt(int index, bool enabled) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  model_->SetEnabledAt(index, enabled);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::IsChecked(int command_id) {
+  return IsCheckedAt(GetIndexOf(command_id));
+}
+
+bool CefSimpleMenuModelImpl::IsCheckedAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  return model_->IsItemCheckedAt(index);
+}
+
+bool CefSimpleMenuModelImpl::SetChecked(int command_id, bool checked) {
+  if (!VerifyContext() || command_id == kInvalidIndex)
+    return false;
+
+  state_delegate_->SetChecked(command_id, checked);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::SetCheckedAt(int index, bool checked) {
+  return SetChecked(GetCommandIdAt(index), checked);
+}
+
+bool CefSimpleMenuModelImpl::HasAccelerator(int command_id) {
+  return HasAcceleratorAt(GetIndexOf(command_id));
+}
+
+bool CefSimpleMenuModelImpl::HasAcceleratorAt(int index) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  ui::Accelerator accelerator;
+  return model_->GetAcceleratorAt(index, &accelerator);
+}
+
+bool CefSimpleMenuModelImpl::SetAccelerator(int command_id,
+                                            int key_code,
+                                            bool shift_pressed,
+                                            bool ctrl_pressed,
+                                            bool alt_pressed) {
+  if (!VerifyContext() || command_id == kInvalidIndex)
+    return false;
+
+  int modifiers = 0;
+  if (shift_pressed)
+    modifiers |= ui::EF_SHIFT_DOWN;
+  if (ctrl_pressed)
+    modifiers |= ui::EF_CONTROL_DOWN;
+  if (alt_pressed)
+    modifiers |= ui::EF_ALT_DOWN;
+
+  state_delegate_->SetAccelerator(
+      command_id,
+      ui::Accelerator(static_cast<ui::KeyboardCode>(key_code), modifiers));
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::SetAcceleratorAt(int index,
+                                              int key_code,
+                                              bool shift_pressed,
+                                              bool ctrl_pressed,
+                                              bool alt_pressed) {
+  return SetAccelerator(GetCommandIdAt(index), key_code, shift_pressed,
+                        ctrl_pressed, alt_pressed);
+}
+
+bool CefSimpleMenuModelImpl::RemoveAccelerator(int command_id) {
+  if (!VerifyContext() || command_id == kInvalidIndex)
+    return false;
+  state_delegate_->SetAccelerator(command_id, base::nullopt);
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::RemoveAcceleratorAt(int index) {
+  return RemoveAccelerator(GetCommandIdAt(index));
+}
+
+bool CefSimpleMenuModelImpl::GetAccelerator(int command_id,
+                                            int& key_code,
+                                            bool& shift_pressed,
+                                            bool& ctrl_pressed,
+                                            bool& alt_pressed) {
+  return GetAcceleratorAt(GetIndexOf(command_id), key_code, shift_pressed,
+                          ctrl_pressed, alt_pressed);
+}
+
+bool CefSimpleMenuModelImpl::GetAcceleratorAt(int index,
+                                              int& key_code,
+                                              bool& shift_pressed,
+                                              bool& ctrl_pressed,
+                                              bool& alt_pressed) {
+  if (!VerifyContext() || !ValidIndex(index))
+    return false;
+
+  ui::Accelerator accel;
+  if (model_->GetAcceleratorAt(index, &accel)) {
+    key_code = accel.key_code();
+    shift_pressed = accel.modifiers() & ui::EF_SHIFT_DOWN;
+    ctrl_pressed = accel.modifiers() & ui::EF_CONTROL_DOWN;
+    alt_pressed = accel.modifiers() & ui::EF_ALT_DOWN;
+    return true;
+  }
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::SetColor(int command_id,
+                                      cef_menu_color_type_t color_type,
+                                      cef_color_t color) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::SetColorAt(int index,
+                                        cef_menu_color_type_t color_type,
+                                        cef_color_t color) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::GetColor(int command_id,
+                                      cef_menu_color_type_t color_type,
+                                      cef_color_t& color) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::GetColorAt(int index,
+                                        cef_menu_color_type_t color_type,
+                                        cef_color_t& color) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::SetFontList(int command_id,
+                                         const CefString& font_list) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::SetFontListAt(int index,
+                                           const CefString& font_list) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool CefSimpleMenuModelImpl::VerifyContext() {
+  if (base::PlatformThread::CurrentId() != supported_thread_id_) {
+    // This object should only be accessed from the thread that created it.
+    NOTREACHED();
+    return false;
+  }
+
+  if (!model_)
+    return false;
+
+  return true;
+}
+
+bool CefSimpleMenuModelImpl::ValidIndex(int index) {
+  return index > kInvalidIndex && index < model_->GetItemCount();
+}
+
+CefRefPtr<CefSimpleMenuModelImpl> CefSimpleMenuModelImpl::CreateNewSubMenu(
+    ui::SimpleMenuModel* model) {
+  bool is_owned = false;
+  if (!model) {
+    model = new ui::SimpleMenuModel(delegate_);
+    is_owned = true;
+  }
+
+  CefRefPtr<CefSimpleMenuModelImpl> new_impl = new CefSimpleMenuModelImpl(
+      model, delegate_, state_delegate_, is_owned, /*is_submodel=*/true);
+  submenumap_.insert(std::make_pair(model, new_impl));
+  return new_impl;
+}

libcef/browser/simple_menu_model_impl.h

@@ -0,0 +1,166 @@
+// Copyright (c) 2021 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CEF_LIBCEF_BROWSER_SIMPLE_MENU_MODEL_IMPL_H_
+#define CEF_LIBCEF_BROWSER_SIMPLE_MENU_MODEL_IMPL_H_
+#pragma once
+
+#include <vector>
+
+#include "include/cef_menu_model.h"
+
+#include "base/threading/platform_thread.h"
+#include "ui/base/models/simple_menu_model.h"
+
+// Implementation of CefMenuModel that wraps an existing ui::SimpleMenuModel.
+class CefSimpleMenuModelImpl : public CefMenuModel {
+ public:
+  // Interface for setting state using CefMenuModel methods that will later be
+  // retrieved via the ui::SimpleMenuModel::Delegate implementation.
+  class StateDelegate {
+   public:
+    virtual void SetChecked(int command_id, bool checked) = 0;
+    virtual void SetAccelerator(int command_id,
+                                base::Optional<ui::Accelerator> accel) = 0;
+
+   protected:
+    virtual ~StateDelegate() {}
+  };
+
+  // |delegate| should be the same that was used to create |model|.
+  // If |is_owned| is true then |model| will be deleted on Detach().
+  CefSimpleMenuModelImpl(ui::SimpleMenuModel* model,
+                         ui::SimpleMenuModel::Delegate* delegate,
+                         StateDelegate* state_delegate,
+                         bool is_owned,
+                         bool is_submenu);
+  ~CefSimpleMenuModelImpl() override;
+
+  // Must be called before the object is deleted.
+  void Detach();
+
+  // CefMenuModel methods.
+  bool IsSubMenu() override;
+  bool Clear() override;
+  int GetCount() override;
+  bool AddSeparator() override;
+  bool AddItem(int command_id, const CefString& label) override;
+  bool AddCheckItem(int command_id, const CefString& label) override;
+  bool AddRadioItem(int command_id,
+                    const CefString& label,
+                    int group_id) override;
+  CefRefPtr<CefMenuModel> AddSubMenu(int command_id,
+                                     const CefString& label) override;
+  bool InsertSeparatorAt(int index) override;
+  bool InsertItemAt(int index, int command_id, const CefString& label) override;
+  bool InsertCheckItemAt(int index,
+                         int command_id,
+                         const CefString& label) override;
+  bool InsertRadioItemAt(int index,
+                         int command_id,
+                         const CefString& label,
+                         int group_id) override;
+  CefRefPtr<CefMenuModel> InsertSubMenuAt(int index,
+                                          int command_id,
+                                          const CefString& label) override;
+  bool Remove(int command_id) override;
+  bool RemoveAt(int index) override;
+  int GetIndexOf(int command_id) override;
+  int GetCommandIdAt(int index) override;
+  bool SetCommandIdAt(int index, int command_id) override;
+  CefString GetLabel(int command_id) override;
+  CefString GetLabelAt(int index) override;
+  bool SetLabel(int command_id, const CefString& label) override;
+  bool SetLabelAt(int index, const CefString& label) override;
+  MenuItemType GetType(int command_id) override;
+  MenuItemType GetTypeAt(int index) override;
+  int GetGroupId(int command_id) override;
+  int GetGroupIdAt(int index) override;
+  bool SetGroupId(int command_id, int group_id) override;
+  bool SetGroupIdAt(int index, int group_id) override;
+  CefRefPtr<CefMenuModel> GetSubMenu(int command_id) override;
+  CefRefPtr<CefMenuModel> GetSubMenuAt(int index) override;
+  bool IsVisible(int command_id) override;
+  bool IsVisibleAt(int index) override;
+  bool SetVisible(int command_id, bool visible) override;
+  bool SetVisibleAt(int index, bool visible) override;
+  bool IsEnabled(int command_id) override;
+  bool IsEnabledAt(int index) override;
+  bool SetEnabled(int command_id, bool enabled) override;
+  bool SetEnabledAt(int index, bool enabled) override;
+  bool IsChecked(int command_id) override;
+  bool IsCheckedAt(int index) override;
+  bool SetChecked(int command_id, bool checked) override;
+  bool SetCheckedAt(int index, bool checked) override;
+  bool HasAccelerator(int command_id) override;
+  bool HasAcceleratorAt(int index) override;
+  bool SetAccelerator(int command_id,
+                      int key_code,
+                      bool shift_pressed,
+                      bool ctrl_pressed,
+                      bool alt_pressed) override;
+  bool SetAcceleratorAt(int index,
+                        int key_code,
+                        bool shift_pressed,
+                        bool ctrl_pressed,
+                        bool alt_pressed) override;
+  bool RemoveAccelerator(int command_id) override;
+  bool RemoveAcceleratorAt(int index) override;
+  bool GetAccelerator(int command_id,
+                      int& key_code,
+                      bool& shift_pressed,
+                      bool& ctrl_pressed,
+                      bool& alt_pressed) override;
+  bool GetAcceleratorAt(int index,
+                        int& key_code,
+                        bool& shift_pressed,
+                        bool& ctrl_pressed,
+                        bool& alt_pressed) override;
+  bool SetColor(int command_id,
+                cef_menu_color_type_t color_type,
+                cef_color_t color) override;
+  bool SetColorAt(int index,
+                  cef_menu_color_type_t color_type,
+                  cef_color_t color) override;
+  bool GetColor(int command_id,
+                cef_menu_color_type_t color_type,
+                cef_color_t& color) override;
+  bool GetColorAt(int index,
+                  cef_menu_color_type_t color_type,
+                  cef_color_t& color) override;
+  bool SetFontList(int command_id, const CefString& font_list) override;
+  bool SetFontListAt(int index, const CefString& font_list) override;
+
+  ui::SimpleMenuModel* model() const { return model_; }
+
+ private:
+  // Verify that the object is attached and being accessed from the correct
+  // thread.
+  bool VerifyContext();
+
+  // Returns true if |index| is valid.
+  bool ValidIndex(int index);
+
+  CefRefPtr<CefSimpleMenuModelImpl> CreateNewSubMenu(
+      ui::SimpleMenuModel* model);
+
+  base::PlatformThreadId supported_thread_id_;
+
+  ui::SimpleMenuModel* model_;
+  ui::SimpleMenuModel::Delegate* const delegate_;
+  StateDelegate* const state_delegate_;
+  const bool is_owned_;
+  const bool is_submenu_;
+
+  // Keep the submenus alive until they're removed, or we're destroyed.
+  using SubMenuMap =
+      std::map<ui::SimpleMenuModel*, CefRefPtr<CefSimpleMenuModelImpl>>;
+  SubMenuMap submenumap_;
+
+  IMPLEMENT_REFCOUNTING(CefSimpleMenuModelImpl);
+  DISALLOW_COPY_AND_ASSIGN(CefSimpleMenuModelImpl);
+};
+
+#endif  // CEF_LIBCEF_BROWSER_SIMPLE_MENU_MODEL_IMPL_H_

patch/patch.cfg

@@ -222,6 +222,11 @@ patches = [
     # NavigationTest.LoadCrossOriginLoadURL with the chrome runtime.
     'name': 'chrome_browser_content_settings',
   },
+  {
+    # chrome: Support custom handling of context menus.
+    # https://bitbucket.org/chromiumembedded/cef/issues/2969
+    'name': 'chrome_browser_context_menus',
+  },
   {
     # Don't initialize ExtensionSystemFactory when extensions are disabled.
     # https://bitbucket.org/chromiumembedded/cef/issues/2852

patch/patches/chrome_browser_context_menus.patch

@@ -0,0 +1,214 @@
+diff --git chrome/browser/renderer_context_menu/render_view_context_menu.cc chrome/browser/renderer_context_menu/render_view_context_menu.cc
+index 86f785a8658f..e7693b4a5efc 100644
+--- chrome/browser/renderer_context_menu/render_view_context_menu.cc
++++ chrome/browser/renderer_context_menu/render_view_context_menu.cc
+@@ -253,6 +253,13 @@ base::OnceCallback<void(RenderViewContextMenu*)>* GetMenuShownCallback() {
+   return callback.get();
+ }
+ 
++
++RenderViewContextMenu::MenuCreatedCallback* GetMenuCreatedCallback() {
++  static base::NoDestructor<RenderViewContextMenu::MenuCreatedCallback>
++      callback;
++  return callback.get();
++}
++
+ enum class UmaEnumIdLookupType {
+   GeneralEnumId,
+   ContextSpecificEnumId,
+@@ -461,6 +468,10 @@ int FindUMAEnumValueForCommand(int id, UmaEnumIdLookupType type) {
+   if (ContextMenuMatcher::IsExtensionsCustomCommandId(id))
+     return 1;
+ 
++  // Match the MENU_ID_USER_FIRST to MENU_ID_USER_LAST range from cef_types.h.
++  if (id >= 26500 && id <= 28500)
++    return 1;
++
+   id = CollapseCommandsForUMA(id);
+   const auto& map = GetIdcToUmaMap(type);
+   auto it = map.find(id);
+@@ -616,6 +627,14 @@ RenderViewContextMenu::RenderViewContextMenu(
+   }
+   set_content_type(
+       ContextMenuContentTypeFactory::Create(source_web_contents_, params));
++
++  auto* cb = GetMenuCreatedCallback();
++  if (!cb->is_null()) {
++    first_observer_ = cb->Run(this);
++    if (first_observer_) {
++      observers_.AddObserver(first_observer_.get());
++    }
++  }
+ }
+ 
+ RenderViewContextMenu::~RenderViewContextMenu() = default;
+@@ -966,6 +985,12 @@ void RenderViewContextMenu::InitMenu() {
+   // menu, meaning that each menu item added/removed in this function will cause
+   // it to visibly jump on the screen (see b/173569669).
+   AppendQuickAnswersItems();
++
++  if (first_observer_) {
++    // Do this last so that the observer can optionally modify previously
++    // created items.
++    first_observer_->InitMenu(params_);
++  }
+ }
+ 
+ Profile* RenderViewContextMenu::GetProfile() const {
+@@ -2590,6 +2615,12 @@ void RenderViewContextMenu::RegisterMenuShownCallbackForTesting(
+   *GetMenuShownCallback() = std::move(cb);
+ }
+ 
++// static
++void RenderViewContextMenu::RegisterMenuCreatedCallback(
++    MenuCreatedCallback cb) {
++  *GetMenuCreatedCallback() = cb;
++}
++
+ ProtocolHandlerRegistry::ProtocolHandlerList
+ RenderViewContextMenu::GetHandlersForLinkUrl() {
+   ProtocolHandlerRegistry::ProtocolHandlerList handlers =
+diff --git chrome/browser/renderer_context_menu/render_view_context_menu.h chrome/browser/renderer_context_menu/render_view_context_menu.h
+index 25f331b10b01..5ea2e8ba1c7a 100644
+--- chrome/browser/renderer_context_menu/render_view_context_menu.h
++++ chrome/browser/renderer_context_menu/render_view_context_menu.h
+@@ -92,6 +92,12 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
+   static void RegisterMenuShownCallbackForTesting(
+       base::OnceCallback<void(RenderViewContextMenu*)> cb);
+ 
++  // Registers a callback that will be called each time a context menu is
++  // created.
++  using MenuCreatedCallback = base::RepeatingCallback<
++      std::unique_ptr<RenderViewContextMenuObserver>(RenderViewContextMenu*)>;
++  static void RegisterMenuCreatedCallback(MenuCreatedCallback cb);
++
+  protected:
+   Profile* GetProfile() const;
+ 
+@@ -266,6 +272,9 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
+   ui::SimpleMenuModel protocol_handler_submenu_model_;
+   ProtocolHandlerRegistry* protocol_handler_registry_;
+ 
++  // An observer returned via MenuCreatedCallback that will be called first.
++  std::unique_ptr<RenderViewContextMenuObserver> first_observer_;
++
+   // An observer that handles spelling suggestions, "Add to dictionary", and
+   // "Use enhanced spell check" items.
+   std::unique_ptr<SpellingMenuObserver> spelling_suggestions_menu_observer_;
+diff --git chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
+index f6ff626c408e..b9300419672d 100644
+--- chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
++++ chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
+@@ -136,6 +136,9 @@ void RenderViewContextMenuViews::RunMenuAt(views::Widget* parent,
+ bool RenderViewContextMenuViews::GetAcceleratorForCommandId(
+     int command_id,
+     ui::Accelerator* accel) const {
++  if (RenderViewContextMenu::GetAcceleratorForCommandId(command_id, accel))
++    return true;
++
+   // There are no formally defined accelerators we can query so we assume
+   // that Ctrl+C, Ctrl+V, Ctrl+X, Ctrl-A, etc do what they normally do.
+   switch (command_id) {
+diff --git components/renderer_context_menu/render_view_context_menu_base.cc components/renderer_context_menu/render_view_context_menu_base.cc
+index d8ef3850f0ad..d18382efec7f 100644
+--- components/renderer_context_menu/render_view_context_menu_base.cc
++++ components/renderer_context_menu/render_view_context_menu_base.cc
+@@ -352,6 +352,17 @@ bool RenderViewContextMenuBase::IsCommandIdChecked(int id) const {
+   return false;
+ }
+ 
++bool RenderViewContextMenuBase::GetAcceleratorForCommandId(
++    int id,
++    ui::Accelerator* accelerator) const {
++  for (auto& observer : observers_) {
++    if (observer.IsCommandIdSupported(id))
++      return observer.GetAccelerator(id, accelerator);
++  }
++
++  return false;
++}
++
+ void RenderViewContextMenuBase::ExecuteCommand(int id, int event_flags) {
+   command_executed_ = true;
+   RecordUsedItem(id);
+diff --git components/renderer_context_menu/render_view_context_menu_base.h components/renderer_context_menu/render_view_context_menu_base.h
+index 2dca58a6553e..1d139e77da21 100644
+--- components/renderer_context_menu/render_view_context_menu_base.h
++++ components/renderer_context_menu/render_view_context_menu_base.h
+@@ -82,6 +82,9 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
+ 
+   const ui::SimpleMenuModel& menu_model() const { return menu_model_; }
+   const content::ContextMenuParams& params() const { return params_; }
++  content::WebContents* source_web_contents() const {
++    return source_web_contents_;
++  }
+ 
+   // Returns true if the specified command id is known and valid for
+   // this menu. If the command is known |enabled| is set to indicate
+@@ -90,6 +93,9 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
+ 
+   // SimpleMenuModel::Delegate implementation.
+   bool IsCommandIdChecked(int command_id) const override;
++  bool GetAcceleratorForCommandId(
++      int command_id,
++      ui::Accelerator* accelerator) const override;
+   void ExecuteCommand(int command_id, int event_flags) override;
+   void OnMenuWillShow(ui::SimpleMenuModel* source) override;
+   void MenuClosed(ui::SimpleMenuModel* source) override;
+@@ -119,6 +125,9 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
+   content::WebContents* GetWebContents() const override;
+   content::BrowserContext* GetBrowserContext() const override;
+ 
++  // May return nullptr if the frame was deleted while the menu was open.
++  content::RenderFrameHost* GetRenderFrameHost() const;
++
+  protected:
+   friend class RenderViewContextMenuTest;
+   friend class RenderViewContextMenuPrefsTest;
+@@ -156,9 +165,6 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
+   // TODO(oshima): Remove this.
+   virtual void AppendPlatformEditableItems() {}
+ 
+-  // May return nullptr if the frame was deleted while the menu was open.
+-  content::RenderFrameHost* GetRenderFrameHost() const;
+-
+   bool IsCustomItemChecked(int id) const;
+   bool IsCustomItemEnabled(int id) const;
+ 
+diff --git components/renderer_context_menu/render_view_context_menu_observer.cc components/renderer_context_menu/render_view_context_menu_observer.cc
+index 2e2d05f91c64..85b256b2be9b 100644
+--- components/renderer_context_menu/render_view_context_menu_observer.cc
++++ components/renderer_context_menu/render_view_context_menu_observer.cc
+@@ -15,3 +15,8 @@ bool RenderViewContextMenuObserver::IsCommandIdChecked(int command_id) {
+ bool RenderViewContextMenuObserver::IsCommandIdEnabled(int command_id) {
+   return false;
+ }
++
++bool RenderViewContextMenuObserver::GetAccelerator(int command_id,
++                                                   ui::Accelerator* accel) {
++  return false;
++}
+diff --git components/renderer_context_menu/render_view_context_menu_observer.h components/renderer_context_menu/render_view_context_menu_observer.h
+index b360a8eb4e82..6f9023a62904 100644
+--- components/renderer_context_menu/render_view_context_menu_observer.h
++++ components/renderer_context_menu/render_view_context_menu_observer.h
+@@ -11,6 +11,10 @@ namespace content {
+ struct ContextMenuParams;
+ }
+ 
++namespace ui {
++class Accelerator;
++}
++
+ // The interface used for implementing context-menu items. The following
+ // instruction describe how to implement a context-menu item with this
+ // interface.
+@@ -100,6 +104,8 @@ class RenderViewContextMenuObserver {
+   virtual bool IsCommandIdChecked(int command_id);
+   virtual bool IsCommandIdEnabled(int command_id);
+ 
++  virtual bool GetAccelerator(int command_id, ui::Accelerator* accel);
++
+   // Called when a user selects the specified context-menu item. This is
+   // only called when the observer returns true for IsCommandIdSupported()
+   // for that |command_id|.

tests/cefclient/browser/client_handler.cc

@@ -321,24 +321,32 @@ void ClientHandler::OnBeforeContextMenu(CefRefPtr<CefBrowser> browser,
     if (model->GetCount() > 0)
       model->AddSeparator();
 
-    // Add DevTools items to all context menus.
+    const bool use_chrome_runtime = MainContext::Get()->UseChromeRuntime();
-    model->AddItem(CLIENT_ID_SHOW_DEVTOOLS, "&Show DevTools");
+    if (!use_chrome_runtime) {
-    model->AddItem(CLIENT_ID_CLOSE_DEVTOOLS, "Close DevTools");
+      // TODO(chrome-runtime): Add support for this.
-    model->AddSeparator();
+      // Add DevTools items to all context menus.
-    model->AddItem(CLIENT_ID_INSPECT_ELEMENT, "Inspect Element");
+      model->AddItem(CLIENT_ID_SHOW_DEVTOOLS, "&Show DevTools");
+      model->AddItem(CLIENT_ID_CLOSE_DEVTOOLS, "Close DevTools");
+      model->AddSeparator();
+      model->AddItem(CLIENT_ID_INSPECT_ELEMENT, "Inspect Element");
+    }
 
     if (HasSSLInformation(browser)) {
       model->AddSeparator();
       model->AddItem(CLIENT_ID_SHOW_SSL_INFO, "Show SSL information");
     }
 
-    model->AddSeparator();
+    if (!use_chrome_runtime) {
-    model->AddItem(CLIENT_ID_CURSOR_CHANGE_DISABLED, "Cursor change disabled");
+      // TODO(chrome-runtime): Add support for this.
-    if (mouse_cursor_change_disabled_)
+      model->AddSeparator();
-      model->SetChecked(CLIENT_ID_CURSOR_CHANGE_DISABLED, true);
+      model->AddCheckItem(CLIENT_ID_CURSOR_CHANGE_DISABLED,
+                          "Cursor change disabled");
+      if (mouse_cursor_change_disabled_)
+        model->SetChecked(CLIENT_ID_CURSOR_CHANGE_DISABLED, true);
+    }
 
     model->AddSeparator();
-    model->AddItem(CLIENT_ID_OFFLINE, "Offline mode");
+    model->AddCheckItem(CLIENT_ID_OFFLINE, "Offline mode");
     if (offline_)
       model->SetChecked(CLIENT_ID_OFFLINE, true);
 

tests/cefclient/browser/main_context.h

@@ -38,6 +38,9 @@ class MainContext {
   // Returns the background color.
   virtual cef_color_t GetBackgroundColor() = 0;
 
+  // Returns true if the Chrome runtime will be used.
+  virtual bool UseChromeRuntime() = 0;
+
   // Returns true if the Views framework will be used.
   virtual bool UseViews() = 0;
 

tests/cefclient/browser/main_context_impl.cc

@@ -171,6 +171,10 @@ cef_color_t MainContextImpl::GetBackgroundColor() {
   return background_color_;
 }
 
+bool MainContextImpl::UseChromeRuntime() {
+  return use_chrome_runtime_;
+}
+
 bool MainContextImpl::UseViews() {
   return use_views_;
 }

tests/cefclient/browser/main_context_impl.h

@@ -27,6 +27,7 @@ class MainContextImpl : public MainContext {
   std::string GetAppWorkingDirectory() OVERRIDE;
   std::string GetMainURL() OVERRIDE;
   cef_color_t GetBackgroundColor() OVERRIDE;
+  bool UseChromeRuntime() OVERRIDE;
   bool UseViews() OVERRIDE;
   bool UseWindowlessRendering() OVERRIDE;
   bool TouchEventsEnabled() OVERRIDE;