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

chrome/browser/file_system_proxy.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_BROWSER_FILE_SYSTEM_PROXY_H_
 #define CHROME_BROWSER_FILE_SYSTEM_PROXY_H_
 
 #include "base/callback.h"
 #include "base/platform_file.h"
-#include "base/ref_counted.h"
 
 // This class provides asynchronous access to common file routines.
 class FileSystemProxy {
  public:
   // This callback is used by methods that report success with a bool.  It is
   // valid to pass NULL as the callback parameter to any function that takes a
   // StatusCallback, in which case the operation will complete silently.
   typedef Callback1<bool /* succeeded */>::Type StatusCallback;
 
   // Creates or opens a file with the given flags.  It is invalid to pass NULL
@@ skipping 19 matching lines @@
 
   // Deletes a directory and all of its contents.
   static void RecursiveDelete(const FilePath& file_path,
                               StatusCallback* callback);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemProxy);
 };
 
 #endif  // CHROME_BROWSER_FILE_SYSTEM_PROXY_H_