Add missing include guards in Cocoa code.

chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h
index 2e18f7d351e604ffd81f04b13eac4ca2c504f10b..2176ec3de3cc3cfab393d6cb67b96f6a7cd7833f 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h
@@ -2,10 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Controller (MVC) for the bookmark menu.
-// All bookmark menu item commands get directed here.
-// Unfortunately there is already a C++ class named BookmarkMenuController.
-
 #ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_MENU_COCOA_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_MENU_COCOA_CONTROLLER_H_
 
@@ -20,6 +16,9 @@ namespace bookmarks {
 class BookmarkNode;
 }
 
+// Controller (MVC) for the bookmark menu.
+// All bookmark menu item commands get directed here.
+// Unfortunately there is already a C++ class named BookmarkMenuController.
 @interface BookmarkMenuCocoaController : NSObject<NSMenuDelegate> {
  @private
   BookmarkMenuBridge* bridge_;  // weak; owns me