cef/patch/patches/chrome_browser_browser.patch

diff --git chrome/browser/browser_about_handler.cc chrome/browser/browser_about_handler.cc
index 2480282a19d12..dbd1fbf8a15b5 100644
--- chrome/browser/browser_about_handler.cc
+++ chrome/browser/browser_about_handler.cc
@@ -72,6 +72,9 @@ bool HandleNonNavigationAboutURL(const GURL& url) {
         FROM_HERE, base::BindOnce(&chrome::AttemptExit));
     return true;
   }
+  if (base::EqualsCaseInsensitiveASCII(spec, "chrome://ignore/")) {
+    return true;
+  }
 
   return false;
 }
diff --git chrome/browser/devtools/devtools_window.cc chrome/browser/devtools/devtools_window.cc
index 4acc7a7a3998c..d80104e8f5aa3 100644
--- chrome/browser/devtools/devtools_window.cc
+++ chrome/browser/devtools/devtools_window.cc
@@ -38,6 +38,7 @@
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/task_manager/web_contents_tags.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
@@ -1211,6 +1212,13 @@ DevToolsWindow* DevToolsWindow::Create(
         !browser->is_type_normal()) {
       can_dock = false;
     }
+
+#if BUILDFLAG(ENABLE_CEF)
+    if (can_dock && browser && browser->cef_delegate()) {
+      // Don't dock DevTools for CEF-managed browsers.
+      can_dock = false;
+    }
+#endif
   }
 
   // Create WebContents with devtools.
@@ -1674,9 +1682,13 @@ void DevToolsWindow::OpenInNewTab(const GURL& url) {
   if (!inspected_web_contents ||
       !inspected_web_contents->OpenURL(params,
                                        /*navigation_handle_callback=*/{})) {
+#if !BUILDFLAG(ENABLE_CEF)
+    // Remove default behavior when CEF handles the open via OnOpenURLFromTab.
+    // See CEF issue #3735.
     chrome::ScopedTabbedBrowserDisplayer displayer(profile_);
     chrome::AddSelectedTabWithURL(displayer.browser(), fixed_url,
                                   ui::PAGE_TRANSITION_LINK);
+#endif
   }
 }
 
@@ -1839,12 +1851,28 @@ void DevToolsWindow::CreateDevToolsBrowser() {
       Browser::CreationStatus::kOk) {
     return;
   }
-  browser_ =
-      Browser::Create(Browser::CreateParams::CreateForDevTools(profile_));
-  browser_->tab_strip_model()->AddWebContents(
-      OwnedMainWebContents::TakeWebContents(
-          std::move(owned_main_web_contents_)),
-      -1, ui::PAGE_TRANSITION_AUTO_TOPLEVEL, AddTabTypes::ADD_ACTIVE);
+
+  auto* inspected_web_contents = GetInspectedWebContents();
+  auto* opener = chrome::FindBrowserWithTab(inspected_web_contents);
+  auto devtools_contents = OwnedMainWebContents::TakeWebContents(
+      std::move(owned_main_web_contents_));
+
+#if BUILDFLAG(ENABLE_CEF)
+  // If a Browser is created, it will take ownership of |devtools_contents|.
+  browser_ = cef::BrowserDelegate::CreateDevToolsBrowser(
+      profile_, opener, inspected_web_contents, devtools_contents);
+#endif
+
+  if (!browser_) {
+    auto create_params = Browser::CreateParams::CreateForDevTools(profile_);
+    create_params.opener = opener;
+
+    browser_ = Browser::Create(std::move(create_params));
+    browser_->tab_strip_model()->AddWebContents(
+        std::move(devtools_contents),
+        -1, ui::PAGE_TRANSITION_AUTO_TOPLEVEL, AddTabTypes::ADD_ACTIVE);
+  }
+
   OverrideAndSyncDevToolsRendererPrefs();
 }
 
diff --git chrome/browser/ui/BUILD.gn chrome/browser/ui/BUILD.gn
index c54ec37e56ad7..fda899ec278ef 100644
--- chrome/browser/ui/BUILD.gn
+++ chrome/browser/ui/BUILD.gn
@@ -8,6 +8,7 @@ import("//build/config/compiler/compiler.gni")
 import("//build/config/features.gni")
 import("//build/config/ozone.gni")
 import("//build/config/ui.gni")
+import("//cef/libcef/features/features.gni")
 import("//chrome/browser/buildflags.gni")
 import("//chrome/common/features.gni")
 import("//chromeos/ash/components/assistant/assistant.gni")
@@ -417,6 +418,10 @@ static_library("ui") {
     "//build/config/compiler:wexit_time_destructors",
   ]
 
+  if (enable_cef) {
+    configs += [ "//cef/libcef/features:config" ]
+  }
+
   public_deps = [
     # WARNING WARNING WARNING
     # New dependencies outside of //chrome/browser should be added to
@@ -438,6 +443,7 @@ static_library("ui") {
     "//build:chromeos_buildflags",
     "//build/config/chromebox_for_meetings:buildflags",
     "//cc/paint",
+    "//cef/libcef/features",
     "//chrome:resources",
     "//chrome:strings",
     "//chrome/app:chrome_dll_resources",
@@ -739,6 +745,10 @@ static_library("ui") {
     deps += [ "//components/plus_addresses/resources:vector_icons" ]
   }
 
+  if (enable_cef) {
+    deps += [ "//cef:cef_resources" ]
+  }
+
   # TODO(crbug.com/41437292): Remove this circular dependency.
   # Any circular includes must depend on the target "//chrome/browser:browser_public_dependencies".
   allow_circular_includes_from = [
@@ -1540,7 +1550,6 @@ static_library("ui") {
       "tabs/tab_menu_model_factory.h",
       "tabs/tab_model.cc",
       "tabs/tab_model.h",
-      "tabs/tab_network_state.cc",
       "tabs/tab_network_state.h",
       "tabs/tab_renderer_data.cc",
       "tabs/tab_renderer_data.h",
@@ -2323,6 +2332,8 @@ static_library("ui") {
       "views/apps/app_dialog/app_local_block_dialog_view.h",
       "views/apps/app_dialog/app_pause_dialog_view.cc",
       "views/apps/app_dialog/app_pause_dialog_view.h",
+      "views/apps/app_dialog/app_uninstall_dialog_view.cc",
+      "views/apps/app_dialog/app_uninstall_dialog_view.h",
       "views/apps/app_info_dialog/arc_app_info_links_panel.cc",
       "views/apps/app_info_dialog/arc_app_info_links_panel.h",
       "views/apps/chrome_app_window_client_views_chromeos.cc",
@@ -3875,8 +3886,6 @@ static_library("ui") {
       "autofill/payments/webauthn_dialog_model.h",
       "autofill/payments/webauthn_dialog_model_observer.h",
       "autofill/payments/webauthn_dialog_state.h",
-      "frame/window_frame_util.cc",
-      "frame/window_frame_util.h",
       "incognito_clear_browsing_data_dialog_interface.h",
       "passwords/password_cross_domain_confirmation_popup_controller_impl.cc",
       "passwords/password_cross_domain_confirmation_popup_controller_impl.h",
@@ -4758,8 +4767,6 @@ static_library("ui") {
       "views/accessibility/theme_tracking_non_accessible_image_view.h",
       "views/apps/app_dialog/app_dialog_view.cc",
       "views/apps/app_dialog/app_dialog_view.h",
-      "views/apps/app_dialog/app_uninstall_dialog_view.cc",
-      "views/apps/app_dialog/app_uninstall_dialog_view.h",
       "views/apps/app_info_dialog/app_info_dialog_container.cc",
       "views/apps/app_info_dialog/app_info_dialog_container.h",
       "views/apps/app_info_dialog/app_info_dialog_views.cc",
@@ -6578,6 +6585,7 @@ static_library("ui") {
   if (enable_printing) {
     deps += [
       "//components/printing/browser",
+      "//components/printing/common:mojo_interfaces",
       "//printing",
     ]
   }
diff --git chrome/browser/ui/browser.cc chrome/browser/ui/browser.cc
index 681fe10f28260..19a47e4a5bb22 100644
--- chrome/browser/ui/browser.cc
+++ chrome/browser/ui/browser.cc
@@ -271,6 +271,25 @@
 #include "components/captive_portal/content/captive_portal_tab_helper.h"
 #endif
 
+#if BUILDFLAG(ENABLE_CEF)
+#define CALL_CEF_DELEGATE(name, ...) \
+  if (cef_browser_delegate_) { \
+    cef_browser_delegate_->name(__VA_ARGS__); \
+  }
+#define CALL_CEF_DELEGATE_RETURN(name, ...) \
+  if (cef_browser_delegate_) { \
+    return cef_browser_delegate_->name(__VA_ARGS__); \
+  }
+#define CALL_CEF_DELEGATE_RESULT(name, result, ...) \
+  if (cef_browser_delegate_) { \
+    result = cef_browser_delegate_->name(__VA_ARGS__); \
+  }
+#else  // !BUILDFLAG(ENABLE_CEF)
+#define CALL_CEF_DELEGATE(name, ...)
+#define CALL_CEF_DELEGATE_RETURN(name, ...)
+#define CALL_CEF_DELEGATE_RESULT(name, result, ...)
+#endif
+
 #if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/extension_browser_window_helper.h"
 #endif
@@ -536,6 +555,10 @@ Browser::Browser(const CreateParams& params)
       type_(params.type),
       profile_(params.profile),
       window_(nullptr),
+#if BUILDFLAG(ENABLE_CEF)
+      cef_browser_delegate_(
+          cef::BrowserDelegate::Create(this, params.cef_params, params.opener)),
+#endif
       tab_strip_model_delegate_(
           std::make_unique<chrome::BrowserTabStripModelDelegate>(this)),
       tab_strip_model_(std::make_unique<TabStripModel>(
@@ -769,6 +792,12 @@ Browser::~Browser() {
   // away so they don't try and call back to us.
   if (select_file_dialog_.get())
     select_file_dialog_->ListenerDestroyed();
+
+  // Clean up any objects attached via UserData before implicit destruction
+  // of CreateParams. Destruction of those objects may call into something
+  // (ProfileImpl, PrefService, etc) that will be destroyed when the last
+  // CefRequestContextImpl reference (held by CreateParams) is released.
+  ClearAllUserData();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -1242,6 +1271,8 @@ void Browser::WindowFullscreenStateChanged() {
       ->WindowFullscreenStateChanged();
   command_controller_->FullscreenStateChanged();
   UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TOGGLE_FULLSCREEN);
+
+  CALL_CEF_DELEGATE(WindowFullscreenStateChanged);
 }
 
 void Browser::FullscreenTopUIStateChanged() {
@@ -1615,6 +1646,14 @@ content::KeyboardEventProcessingResult Browser::PreHandleKeyboardEvent(
   if (exclusive_access_manager_->HandleUserKeyEvent(event))
     return content::KeyboardEventProcessingResult::HANDLED;
 
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_) {
+    auto result = cef_browser_delegate_->PreHandleKeyboardEvent(source, event);
+    if (result != content::KeyboardEventProcessingResult::NOT_HANDLED)
+      return result;
+  }
+#endif
+
   return window()->PreHandleKeyboardEvent(event);
 }
 
@@ -1622,8 +1661,18 @@ bool Browser::HandleKeyboardEvent(content::WebContents* source,
                                   const NativeWebKeyboardEvent& event) {
   DevToolsWindow* devtools_window =
       DevToolsWindow::GetInstanceForInspectedWebContents(source);
-  return (devtools_window && devtools_window->ForwardKeyboardEvent(event)) ||
-         window()->HandleKeyboardEvent(event);
+  if (devtools_window && devtools_window->ForwardKeyboardEvent(event)) {
+    return true;
+  }
+
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_ &&
+      cef_browser_delegate_->HandleKeyboardEvent(source, event)) {
+    return true;
+  }
+#endif
+
+  return window()->HandleKeyboardEvent(event);
 }
 
 bool Browser::TabsNeedBeforeUnloadFired() const {
@@ -1785,6 +1834,14 @@ WebContents* Browser::OpenURLFromTab(
   }
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_ &&
+      !cef_browser_delegate_->OpenURLFromTabEx(source, params,
+                                               navigation_handle_callback)) {
+    return nullptr;
+  }
+#endif
+
   NavigateParams nav_params(this, params.url, params.transition);
   nav_params.FillNavigateParamsFromOpenURLParams(params);
   nav_params.source_contents = source;
@@ -1947,6 +2004,8 @@ void Browser::LoadingStateChanged(WebContents* source,
                                   bool should_show_loading_ui) {
   ScheduleUIUpdate(source, content::INVALIDATE_TYPE_LOAD);
   UpdateWindowForLoadingStateChanged(source, should_show_loading_ui);
+
+  CALL_CEF_DELEGATE(LoadingStateChanged, source, should_show_loading_ui);
 }
 
 void Browser::CloseContents(WebContents* source) {
@@ -1975,6 +2034,8 @@ void Browser::SetContentsBounds(WebContents* source, const gfx::Rect& bounds) {
 }
 
 void Browser::UpdateTargetURL(WebContents* source, const GURL& url) {
+  CALL_CEF_DELEGATE(UpdateTargetURL, source, url);
+
   if (!GetStatusBubble())
     return;
 
@@ -1982,6 +2043,17 @@ void Browser::UpdateTargetURL(WebContents* source, const GURL& url) {
     GetStatusBubble()->SetURL(url);
 }
 
+bool Browser::DidAddMessageToConsole(
+    content::WebContents* source,
+    blink::mojom::ConsoleMessageLevel log_level,
+    const std::u16string& message,
+    int32_t line_no,
+    const std::u16string& source_id) {
+  CALL_CEF_DELEGATE_RETURN(DidAddMessageToConsole, source, log_level, message,
+                           line_no, source_id);
+  return false;
+}
+
 void Browser::ContentsMouseEvent(WebContents* source, const ui::Event& event) {
   const ui::EventType type = event.type();
   const bool exited = type == ui::EventType::kMouseExited;
@@ -2010,6 +2082,19 @@ bool Browser::TakeFocus(content::WebContents* source, bool reverse) {
   return false;
 }
 
+void Browser::CanDownload(const GURL& url,
+                          const std::string& request_method,
+                          base::OnceCallback<void(bool)> callback) {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_) {
+    cef_browser_delegate_->CanDownload(url, request_method,
+                                       std::move(callback));
+    return;
+  }
+#endif
+  std::move(callback).Run(true);
+}
+
 void Browser::BeforeUnloadFired(WebContents* web_contents,
                                 bool proceed,
                                 bool* proceed_to_fire_unload) {
@@ -2109,12 +2194,24 @@ void Browser::WebContentsCreated(WebContents* source_contents,
 
   // Make the tab show up in the task manager.
   task_manager::WebContentsTags::CreateForTabContents(new_contents);
+
+  CALL_CEF_DELEGATE(WebContentsCreated, source_contents,
+                    opener_render_process_id, opener_render_frame_id,
+                    frame_name, target_url, new_contents);
 }
 
 void Browser::RendererUnresponsive(
     WebContents* source,
     content::RenderWidgetHost* render_widget_host,
     base::RepeatingClosure hang_monitor_restarter) {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_ &&
+      cef_browser_delegate_->RendererUnresponsiveEx(source, render_widget_host,
+                                                    hang_monitor_restarter)) {
+    return; 
+  }
+#endif
+
   // Don't show the page hung dialog when a HTML popup hangs because
   // the dialog will take the focus and immediately close the popup.
   RenderWidgetHostView* view = render_widget_host->GetView();
@@ -2127,6 +2224,13 @@ void Browser::RendererUnresponsive(
 void Browser::RendererResponsive(
     WebContents* source,
     content::RenderWidgetHost* render_widget_host) {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_ &&
+      cef_browser_delegate_->RendererResponsiveEx(source, render_widget_host)) {
+    return; 
+  }
+#endif
+
   RenderWidgetHostView* view = render_widget_host->GetView();
   if (view && !render_widget_host->GetView()->IsHTMLFormPopup()) {
     TabDialogs::FromWebContents(source)->HideHungRendererDialog(
@@ -2136,6 +2240,15 @@ void Browser::RendererResponsive(
 
 content::JavaScriptDialogManager* Browser::GetJavaScriptDialogManager(
     WebContents* source) {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_) {
+    auto* cef_js_dialog_manager = 
+        cef_browser_delegate_->GetJavaScriptDialogManager(source);
+    if (cef_js_dialog_manager) {
+      return cef_js_dialog_manager;
+    }
+  }
+#endif
   return javascript_dialogs::TabModalDialogManager::FromWebContents(source);
 }
 
@@ -2171,6 +2284,11 @@ void Browser::DraggableRegionsChanged(
   if (app_controller_) {
     app_controller_->DraggableRegionsChanged(regions, contents);
   }
+#if BUILDFLAG(ENABLE_CEF)
+  else if (cef_delegate()) {
+    cef_delegate()->DraggableRegionsChanged(regions, contents);
+  }
+#endif
 }
 
 void Browser::DidFinishNavigation(
@@ -2251,11 +2369,15 @@ void Browser::EnterFullscreenModeForTab(
     const blink::mojom::FullscreenOptions& options) {
   exclusive_access_manager_->fullscreen_controller()->EnterFullscreenModeForTab(
       requesting_frame, options.display_id);
+
+  CALL_CEF_DELEGATE(EnterFullscreenModeForTab, requesting_frame, options);
 }
 
 void Browser::ExitFullscreenModeForTab(WebContents* web_contents) {
   exclusive_access_manager_->fullscreen_controller()->ExitFullscreenModeForTab(
       web_contents);
+
+  CALL_CEF_DELEGATE(ExitFullscreenModeForTab, web_contents);
 }
 
 bool Browser::IsFullscreenForTabOrPending(const WebContents* web_contents) {
@@ -2456,6 +2578,15 @@ void Browser::RequestMediaAccessPermission(
     content::WebContents* web_contents,
     const content::MediaStreamRequest& request,
     content::MediaResponseCallback callback) {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_browser_delegate_) {
+    callback = cef_browser_delegate_->RequestMediaAccessPermissionEx(
+        web_contents, request, std::move(callback));
+    if (callback.is_null())
+      return;
+  }
+#endif
+
   const extensions::Extension* extension =
       GetExtensionForOrigin(profile_, request.security_origin);
   MediaCaptureDevicesDispatcher::GetInstance()->ProcessMediaAccessRequest(
@@ -2998,9 +3129,11 @@ void Browser::RemoveScheduledUpdatesFor(WebContents* contents) {
 // Browser, Getters for UI (private):
 
 StatusBubble* Browser::GetStatusBubble() {
+  bool show_by_default = true;
+
   // For kiosk and exclusive app mode we want to always hide the status bubble.
   if (chrome::IsRunningInAppMode()) {
-    return nullptr;
+    show_by_default = false;
   }
 
   // We hide the status bar for web apps windows as this matches native
@@ -3008,6 +3141,12 @@ StatusBubble* Browser::GetStatusBubble() {
   // mode, as the minimal browser UI includes the status bar.
   if (web_app::AppBrowserController::IsWebApp(this) &&
       !app_controller()->HasMinimalUiButtons()) {
+    show_by_default = false;
+  }
+
+  bool show = show_by_default;
+  CALL_CEF_DELEGATE_RESULT(ShowStatusBubble, show, show_by_default);
+  if (!show) {
     return nullptr;
   }
 
@@ -3157,6 +3296,8 @@ void Browser::SetAsDelegate(WebContents* web_contents, bool set_delegate) {
     BookmarkTabHelper::FromWebContents(web_contents)->RemoveObserver(this);
     web_contents_collection_.StopObserving(web_contents);
   }
+
+  CALL_CEF_DELEGATE(SetAsDelegate, web_contents, set_delegate);
 }
 
 void Browser::TabDetachedAtImpl(content::WebContents* contents,
@@ -3311,6 +3452,14 @@ bool Browser::PictureInPictureBrowserSupportsWindowFeature(
 
 bool Browser::SupportsWindowFeatureImpl(WindowFeature feature,
                                         bool check_can_support) const {
+#if BUILDFLAG(ENABLE_CEF)
+  if (cef_delegate()) {
+    if (auto value = cef_delegate()->SupportsWindowFeature(feature)) {
+      return *value;
+    }
+  }
+#endif
+
   switch (type_) {
     case TYPE_NORMAL:
       return NormalBrowserSupportsWindowFeature(feature, check_can_support);
diff --git chrome/browser/ui/browser.h chrome/browser/ui/browser.h
index cbc5ae1c02941..f0200afb918c1 100644
--- chrome/browser/ui/browser.h
+++ chrome/browser/ui/browser.h
@@ -24,6 +24,7 @@
 #include "base/timer/elapsed_timer.h"
 #include "build/build_config.h"
 #include "build/chromeos_buildflags.h"
+#include "cef/libcef/features/features.h"
 #include "chrome/browser/tab_contents/web_contents_collection.h"
 #include "chrome/browser/themes/theme_service_observer.h"
 #include "chrome/browser/ui/bookmarks/bookmark_bar.h"
@@ -53,6 +54,10 @@
 #include "ui/gfx/geometry/rect.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
+#if BUILDFLAG(ENABLE_CEF)
+#include "cef/libcef/browser/chrome/browser_delegate.h"
+#endif
+
 #if BUILDFLAG(IS_ANDROID)
 #error This file should only be included on desktop.
 #endif
@@ -376,6 +381,15 @@ class Browser : public TabStripModelObserver,
     // Document Picture in Picture options, specific to TYPE_PICTURE_IN_PICTURE.
     std::optional<blink::mojom::PictureInPictureWindowOptions> pip_options;
 
+#if BUILDFLAG(ENABLE_CEF)
+    // Opaque CEF-specific configuration. Will be propagated to new Browsers.
+    scoped_refptr<cef::BrowserDelegate::CreateParams> cef_params;
+
+    // Specify the Browser that is opening this popup.
+    // Currently only used with TYPE_PICTURE_IN_PICTURE and TYPE_DEVTOOLS.
+    raw_ptr<Browser, DanglingUntriaged> opener = nullptr;
+#endif
+
    private:
     friend class Browser;
     friend class WindowSizerChromeOSTest;
@@ -457,6 +471,13 @@ class Browser : public TabStripModelObserver,
     update_ui_immediately_for_testing_ = true;
   }
 
+  // Return true if CEF will expose the toolbar to the client. This value is
+  // used to selectively enable toolbar behaviors such as command processing
+  // and omnibox focus without also including the toolbar in BrowserView layout
+  // calculations.
+  void set_toolbar_overridden(bool val) { toolbar_overridden_ = val; }
+  bool toolbar_overridden() const { return toolbar_overridden_; }
+
   // Accessors ////////////////////////////////////////////////////////////////
 
   const CreateParams& create_params() const { return create_params_; }
@@ -552,6 +573,12 @@ class Browser : public TabStripModelObserver,
   base::WeakPtr<Browser> AsWeakPtr();
   base::WeakPtr<const Browser> AsWeakPtr() const;
 
+#if BUILDFLAG(ENABLE_CEF)
+  cef::BrowserDelegate* cef_delegate() const {
+    return cef_browser_delegate_.get();
+  }
+#endif
+
   // Get the FindBarController for this browser, creating it if it does not
   // yet exist.
   FindBarController* GetFindBarController();
@@ -963,10 +990,18 @@ class Browser : public TabStripModelObserver,
   void SetContentsBounds(content::WebContents* source,
                          const gfx::Rect& bounds) override;
   void UpdateTargetURL(content::WebContents* source, const GURL& url) override;
+  bool DidAddMessageToConsole(content::WebContents* source,
+                              blink::mojom::ConsoleMessageLevel log_level,
+                              const std::u16string& message,
+                              int32_t line_no,
+                              const std::u16string& source_id) override;
   void ContentsMouseEvent(content::WebContents* source,
                           const ui::Event& event) override;
   void ContentsZoomChange(bool zoom_in) override;
   bool TakeFocus(content::WebContents* source, bool reverse) override;
+  void CanDownload(const GURL& url,
+                   const std::string& request_method,
+                   base::OnceCallback<void(bool)> callback) override;
   void BeforeUnloadFired(content::WebContents* source,
                          bool proceed,
                          bool* proceed_to_fire_unload) override;
@@ -1294,6 +1329,10 @@ class Browser : public TabStripModelObserver,
   // This Browser's window.
   raw_ptr<BrowserWindow, DanglingUntriaged> window_;
 
+#if BUILDFLAG(ENABLE_CEF)
+  std::unique_ptr<cef::BrowserDelegate> cef_browser_delegate_;
+#endif
+
   std::unique_ptr<TabStripModelDelegate> const tab_strip_model_delegate_;
   std::unique_ptr<TabStripModel> const tab_strip_model_;
 
@@ -1360,6 +1399,8 @@ class Browser : public TabStripModelObserver,
   const std::string initial_workspace_;
   bool initial_visible_on_all_workspaces_state_;
 
+  bool toolbar_overridden_ = false;
+
   CreationSource creation_source_ = CreationSource::kUnknown;
 
   UnloadController unload_controller_;
diff --git chrome/browser/ui/browser_navigator.cc chrome/browser/ui/browser_navigator.cc
index 1e4d7bc3a4c0a..9ac5f645e4591 100644
--- chrome/browser/ui/browser_navigator.cc
+++ chrome/browser/ui/browser_navigator.cc
@@ -311,6 +311,10 @@ std::pair<Browser*, int> GetBrowserAndTabForDisposition(
 
       browser_params.pip_options = pip_options;
 
+#if BUILDFLAG(ENABLE_CEF)
+      browser_params.opener = params.browser;
+#endif
+
       const BrowserWindow* const browser_window = params.browser->window();
       const gfx::NativeWindow native_window =
           browser_window ? browser_window->GetNativeWindow()
@@ -599,6 +603,13 @@ std::unique_ptr<content::WebContents> CreateTargetContents(
   std::unique_ptr<WebContents> target_contents =
       WebContents::Create(create_params);
 
+#if BUILDFLAG(ENABLE_CEF)
+  auto cef_delegate = params.browser->cef_delegate();
+  if (cef_delegate) {
+    cef_delegate->OnWebContentsCreated(target_contents.get());
+  }
+#endif
+
   // New tabs can have WebUI URLs that will make calls back to arbitrary
   // tab helpers, so the entire set of tab helpers needs to be set up
   // immediately.
diff --git chrome/browser/ui/browser_tabstrip.cc chrome/browser/ui/browser_tabstrip.cc
index e12f401ab7d11..59222cc9601ba 100644
--- chrome/browser/ui/browser_tabstrip.cc
+++ chrome/browser/ui/browser_tabstrip.cc
@@ -33,9 +33,13 @@ content::WebContents* AddAndReturnTabAt(
   // Time new tab page creation time.  We keep track of the timing data in
   // WebContents, but we want to include the time it takes to create the
   // WebContents object too.
+  // For CEF use a PageTransition that matches
+  // CefFrameHostImpl::kPageTransitionExplicit.
   base::TimeTicks new_tab_start_time = base::TimeTicks::Now();
   NavigateParams params(browser, url.is_empty() ? browser->GetNewTabURL() : url,
-                        ui::PAGE_TRANSITION_TYPED);
+                        static_cast<ui::PageTransition>(
+                            ui::PAGE_TRANSITION_TYPED |
+                            ui::PAGE_TRANSITION_FROM_ADDRESS_BAR));
   params.disposition = foreground ? WindowOpenDisposition::NEW_FOREGROUND_TAB
                                   : WindowOpenDisposition::NEW_BACKGROUND_TAB;
   params.tabstrip_index = idx;
@@ -81,6 +85,16 @@ void AddWebContents(Browser* browser,
   // Can't create a new contents for the current tab - invalid case.
   DCHECK(disposition != WindowOpenDisposition::CURRENT_TAB);
 
+#if BUILDFLAG(ENABLE_CEF)
+  if (browser && browser->cef_delegate() && new_contents) {
+    new_contents = browser->cef_delegate()->AddWebContents(
+        std::move(new_contents));
+    if (!new_contents) {
+      return;
+    }
+  }
+#endif
+
   NavigateParams params(browser, std::move(new_contents));
   params.source_contents = source_contents;
   params.url = target_url;