Use a direct include of strings headers in chrome/browser/ui/cocoa/.

chrome/browser/ui/cocoa/status_icons/status_icon_mac.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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_STATUS_ICONS_STATUS_ICON_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_STATUS_ICONS_STATUS_ICON_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_nsobject.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/status_icons/desktop_notification_balloon.h"
 #include "chrome/browser/status_icons/status_icon.h"
 
 @class MenuController;
 @class NSStatusItem;
 @class StatusItemController;
 
 class StatusIconMac : public StatusIcon {
  public:
   StatusIconMac();
@@ skipping 32 matching lines @@
   scoped_nsobject<NSString> toolTip_;
 
   // Status menu shown when right-clicking the system icon, if it has been
   // created by |UpdatePlatformContextMenu|.
   scoped_nsobject<MenuController> menu_;
 
   DISALLOW_COPY_AND_ASSIGN(StatusIconMac);
 };
 
 #endif // CHROME_BROWSER_UI_COCOA_STATUS_ICONS_STATUS_ICON_MAC_H_