Add missing include guards in Cocoa code.

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

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h
index 565c2a72b8ab27db06c8d4eca357fcd6f9dee2e0..72ba1297864e8eb32762c989536d527d0ad73c18 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h
@@ -1,9 +1,6 @@
 // Copyright (c) 2010 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.
-//
-// A simple custom NSView for the bookmark bar used to prevent clicking and
-// dragging from moving the browser window.
 
 #ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_VIEW_COCOA_H_
@@ -36,6 +33,8 @@
 @property(nonatomic, assign) BookmarkBarController* controller;
 @end
 
+// A simple custom NSView for the bookmark bar used to prevent clicking and
+// dragging from moving the browser window.
 @interface BookmarkBarView()  // TestingOrInternalAPI
 @property(nonatomic, readonly) BOOL dropIndicatorShown;
 @property(nonatomic, readonly) CGFloat dropIndicatorPosition;