FBTB: Remove unneeded #includes of base/ref_counted.h and base/string16.h in src/chrome.

chrome/renderer/render_thread.h

 // 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.
 
 #ifndef CHROME_RENDERER_RENDER_THREAD_H_
 #define CHROME_RENDERER_RENDER_THREAD_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/shared_memory.h"
-#include "base/string16.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 #include "chrome/common/child_thread.h"
 #include "chrome/common/css_colors.h"
 #include "chrome/renderer/visitedlink_slave.h"
 #include "gfx/native_widget_types.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_platform_file.h"
 
@@ skipping 339 matching lines @@
 
   // A list of extension web extents, which tells us which URLs belong to an
   // installed app.
   struct ExtensionInfo;
   std::vector<ExtensionInfo> extension_extents_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };
 
 #endif  // CHROME_RENDERER_RENDER_THREAD_H_