Cleanup: Remove unneeded forward declarations from chrome/browser/ui/gtk and chrome/browser/ui/co...

chrome/browser/ui/cocoa/extensions/extension_action_context_menu.h

 // Copyright (c) 2011 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_COCOA_EXTENSIONS_EXTENSION_ACTION_CONTEXT_MENU_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_ACTION_CONTEXT_MENU_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 
 class AsyncUninstaller;
-class DevmodeObserver;
 class Extension;
 class ExtensionAction;
-class NotificationRegistrar;
 class Profile;
 
 namespace extension_action_context_menu {
 
 class DevmodeObserver;
 class ProfileObserverBridge;
 
 }  // namespace extension_action_context_menu
 
 // A context menu used by any extension UI components that require it.
@@ skipping 33 matching lines @@
 
 // Notifies the ExtensionActionContextMenu that the profile is is being
 // destroyed.
 - (void)invalidateProfile;
 
 @end
 
 typedef ExtensionActionContextMenu ExtensionActionContextMenuMac;
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_ACTION_CONTEXT_MENU_H_