Rename GDataFileSystem* to DriveFileSystem*

chrome/browser/chromeos/gdata/file_write_helper.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_CHROMEOS_GDATA_FILE_WRITE_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_FILE_WRITE_HELPER_H_
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/gdata/drive_file_system_interface.h"
 #include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
-#include "chrome/browser/chromeos/gdata/gdata_file_system_interface.h"
 
 namespace gdata {
 
-// This class provides higher level operations for writing to GData files over
-// GDataFileSystemInterface.
+// This class provides higher level operations for writing to Drive files over
+// DriveFileSystemInterface.
 class FileWriteHelper {
  public:
-  explicit FileWriteHelper(GDataFileSystemInterface* file_system);
+  explicit FileWriteHelper(DriveFileSystemInterface* file_system);
   ~FileWriteHelper();
 
   // Prepares a local temporary file path and passes it to |callback| on the
   // blocking thread pool that allows file operations. The modification to
   // the file is reflected to GData |path|. If |path| does not exist, a new
   // file is created.
   //
   // Must be called from UI thread.
   void PrepareWritableFileAndRun(const FilePath& path,
                                  const OpenFileCallback& callback);
 
  private:
   // Part of PrepareWritableFilePathAndRun(). It tries CreateFile for the case
   // file does not exist yet, does OpenFile to download and mark the file as
   // dirty, runs |callback|, and finally calls CloseFile.
   void PrepareWritableFileAndRunAfterCreateFile(
       const FilePath& file_path,
       const OpenFileCallback& callback,
       DriveFileError result);
   void PrepareWritableFileAndRunAfterOpenFile(
       const FilePath& file_path,
       const OpenFileCallback& callback,
       DriveFileError result,
       const FilePath& local_cache_path);
   void PrepareWritableFileAndRunAfterCallback(const FilePath& file_path);
 
   // File system owned by GDataSystemService.
-  GDataFileSystemInterface* file_system_;
+  DriveFileSystemInterface* file_system_;
 
   // WeakPtrFactory bound to the UI thread.
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<FileWriteHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileWriteHelper);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_FILE_WRITE_HELPER_H_