Track the active ExtensionKeybindingRegistry and make it available to EventRewriter.

chrome/browser/ui/views/toolbar/toolbar_view.h

 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 
 #include <set>
 #include <string>
 
@@ skipping 76 matching lines @@
   // Returns the view to which the bookmark bubble should be anchored.
   views::View* GetBookmarkBubbleAnchor();
 
   // Returns the view to which the Translate bubble should be anchored.
   views::View* GetTranslateBubbleAnchor();
 
   // Executes |command| registered by |extension|.
   void ExecuteExtensionCommand(const extensions::Extension* extension,
                                const extensions::Command& command);
 
+  // Returns if the given |accelerator| is registered by an extension.

[Finnur, 2014/09/10 10:15:16]

nit: s/if/whether/

[David Tseng, 2014/09/10 21:19:07]

Done.

+  bool IsExtensionCommandRegistered(const ui::Accelerator& accelerator);
+
   // Shows the app (wrench) menu. |for_drop| indicates whether the menu is
   // opened for a drag-and-drop operation.
   void ShowAppMenu(bool for_drop);
 
   // Accessors.
   Browser* browser() const { return browser_; }
   BrowserActionsContainer* browser_actions() const { return browser_actions_; }
   ReloadButton* reload_button() const { return reload_; }
   LocationBarView* location_bar() const { return location_bar_; }
   views::MenuButton* app_menu() const;
@@ skipping 145 matching lines @@
 
   // A list of listeners to call when the menu opens.
   ObserverList<views::MenuListener> menu_listeners_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_