Rename GDataFileSystem* to DriveFileSystem*

chrome/browser/chromeos/gdata/file_write_helper.cc

 // 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.
 
 #include "chrome/browser/chromeos/gdata/file_write_helper.h"
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace gdata {
 
-FileWriteHelper::FileWriteHelper(GDataFileSystemInterface* file_system)
+FileWriteHelper::FileWriteHelper(DriveFileSystemInterface* file_system)
     : file_system_(file_system),
       weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
   // Must be created in GDataSystemService.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
 FileWriteHelper::~FileWriteHelper() {
   // Must be destroyed in GDataSystemService.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
@@ skipping 62 matching lines @@
   }
 }
 
 void FileWriteHelper::PrepareWritableFileAndRunAfterCallback(
     const FilePath& file_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   file_system_->CloseFile(file_path, FileOperationCallback());
 }
 
 }  // namespace gdata