Add missing include guards in Cocoa code.

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

 // Copyright (c) 2012 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.
 
-// The BookmarkBarToolbarView is responsible for drawing the background of the
-// BookmarkBar's toolbar in either of its two display modes - permanently
-// attached (slimline with a stroke at the bottom edge) or New Tab Page style
-// (padded with a round rect border and the New Tab Page theme behind).
-
 #ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_TOOLBAR_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/animatable_view.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_state.h"
 
 class Profile;
 
 // An interface to allow mocking of a BookmarkBarController by the
 // BookmarkBarToolbarView.
 @protocol BookmarkBarToolbarViewController <BookmarkBarState>
 // Displaying the bookmark toolbar background in bubble (floating) mode requires
 // the size of the currently selected tab to properly calculate where the
 // background image is joined.
 - (int)currentTabContentsHeight;
 
 // Current profile.
 - (Profile*)profile;
 
 @end
 
+// The BookmarkBarToolbarView is responsible for drawing the background of the
+// BookmarkBar's toolbar in either of its two display modes - permanently
+// attached (slimline with a stroke at the bottom edge) or New Tab Page style
+// (padded with a round rect border and the New Tab Page theme behind).
 @interface BookmarkBarToolbarView : AnimatableView {
  @private
   // The controller which tells us how we should be drawing (as normal or as a
   // floating bar). Weak reference.
   id<BookmarkBarToolbarViewController> controller_;
 }
 
 // Exposed so that the controller can nil itself out
 - (void)setController:(id<BookmarkBarToolbarViewController>)controller;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_TOOLBAR_VIEW_H_