drive: Rename 'gdata' namespace to 'drive' in chrome/browser/chromeos/drive

chrome/browser/chromeos/drive/mock_directory_change_observer.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_DRIVE_MOCK_DIRECTORY_CHANGE_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_MOCK_DIRECTORY_CHANGE_OBSERVER_H_
 
 #include "base/file_path.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_observer.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
-namespace gdata {
+namespace drive {
 
 // Mock for DriveFileSystemInterface::Observer::OnDirectoryChanged().
 class MockDirectoryChangeObserver : public DriveFileSystemObserver {
  public:
   MockDirectoryChangeObserver();
   virtual ~MockDirectoryChangeObserver();
 
   // DriveFileSystemInterface::Observer overrides.
   MOCK_METHOD1(OnDirectoryChanged, void(const FilePath& directory_path));
 };
 
-}  // namespace gdata
+}  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_MOCK_DIRECTORY_CHANGE_OBSERVER_H_