Use a direct include of strings headers in x/.

chrome/browser/ui/views/sync/one_click_signin_bubble_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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_SYNC_ONE_CLICK_SIGNIN_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_SYNC_ONE_CLICK_SIGNIN_BUBBLE_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/views/toolbar_view.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
 
 namespace base {
 class MessageLoop;
 }
 
@@ skipping 124 matching lines @@
   // A message loop used only with unit tests.
   base::MessageLoop* message_loop_for_testing_;
 
   // The bubble, if we're showing one.
   static OneClickSigninBubbleView* bubble_view_;
 
   DISALLOW_COPY_AND_ASSIGN(OneClickSigninBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_SYNC_ONE_CLICK_SIGNIN_BUBBLE_VIEW_H_