- 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/menu_runner.h

@@ -0,0 +1,40 @@
+// Copyright (c) 2012 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_MENU_RUNNER_H_
+#define CEF_LIBCEF_BROWSER_MENU_RUNNER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"
+
+namespace content {
+struct ContextMenuParams;
+}
+
+namespace ui {
+class MenuModel;
+}
+
+class CefBrowserHostImpl;
+
+// Provides platform-specific menu implementations for CefMenuCreator.
+class CefMenuRunner {
+ public:
+  virtual bool RunContextMenu(CefBrowserHostImpl* browser,
+                              ui::MenuModel* model,
+                              const content::ContextMenuParams& params) = 0;
+  virtual void CancelContextMenu() {}
+  virtual bool FormatLabel(base::string16& label) { return false; }
+
+ protected:
+  // Allow deletion via scoped_ptr only.
+  friend struct base::DefaultDeleter<CefMenuRunner>;
+
+  CefMenuRunner() {}
+  virtual ~CefMenuRunner() {}
+
+  DISALLOW_COPY_AND_ASSIGN(CefMenuRunner);
+};
+
+#endif  // CEF_LIBCEF_BROWSER_MENU_RUNNER_H_