- Factor platform-specific code out of CefBrowserHostImpl (issue #1749).

- Introduce native/ and osr/ folders for native (non-platform-agnostic) and
    osr (windowless) code respectively.
  - Introduce CefBrowserPlatformDelegate for abstracting platform-specific
    implementations of browser host functionality.
  - Move dialog and menu code to separate manager and platform-specific runner
    implementations exposed via CefBrowserPlatformDelegate.
  - Standardize focus-handling behavior between windowed and windowless
    implementations. CefFocusHandler::OnSetFocus() will now also be called for
    osr focus changes.
- Support multiple simultaneous popups (issue #1289).

libcef/browser/native/menu_runner_linux.cc

@@ -0,0 +1,49 @@
+// Copyright 2014 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/native/menu_runner_linux.h"
+
+#include "libcef/browser/browser_host_impl.h"
+
+#include "base/compiler_specific.h"
+#include "base/strings/string_util.h"
+#include "ui/gfx/geometry/point.h"
+
+CefMenuRunnerLinux::CefMenuRunnerLinux() {
+}
+
+bool CefMenuRunnerLinux::RunContextMenu(
+    CefBrowserHostImpl* browser,
+    ui::MenuModel* model,
+    const content::ContextMenuParams& params) {
+  menu_.reset(
+      new views::MenuRunner(model, views::MenuRunner::CONTEXT_MENU));
+
+  const gfx::Point& screen_point =
+      browser->GetScreenPoint(gfx::Point(params.x, params.y));
+
+  views::Widget* parent_widget = nullptr;
+  if (!browser->IsWindowless())
+    parent_widget = browser->GetWindowWidget();
+
+  views::MenuRunner::RunResult result =
+      menu_->RunMenuAt(parent_widget,
+                       NULL, gfx::Rect(screen_point, gfx::Size()),
+                       views::MENU_ANCHOR_TOPRIGHT,
+                       ui::MENU_SOURCE_NONE);
+  ALLOW_UNUSED_LOCAL(result);
+
+  return true;
+}
+
+void CefMenuRunnerLinux::CancelContextMenu() {
+  if (menu_)
+    menu_->Cancel();
+}
+
+bool CefMenuRunnerLinux::FormatLabel(base::string16& label) {
+  // Remove the accelerator indicator (&) from label strings.
+  const char16 replace[] = {L'&', 0};
+  return base::ReplaceChars(label, replace, base::string16(), &label);
+}