Use a direct include of strings headers in chrome/browser/d*/.

chrome/browser/devtools/devtools_window.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_DEVTOOLS_DEVTOOLS_WINDOW_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/devtools/devtools_file_helper.h"
 #include "chrome/browser/devtools/devtools_toggle_action.h"
 #include "content/public/browser/devtools_client_host.h"
 #include "content/public/browser/devtools_frontend_host_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 
 class Browser;
 class BrowserWindow;
@@ skipping 216 matching lines @@
   scoped_ptr<content::DevToolsClientHost> frontend_host_;
   base::WeakPtrFactory<DevToolsWindow> weak_factory_;
   scoped_ptr<DevToolsFileHelper> file_helper_;
   int width_;
   int height_;
   DevToolsDockSide dock_side_before_minimized_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_