Split gdata_file_system_interface.h from gdata_file_system.h

chrome/browser/chromeos/gdata/mock_gdata_file_system.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_MOCK_GDATA_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_MOCK_GDATA_FILE_SYSTEM_H_
 
 #include <string>
 
-#include "chrome/browser/chromeos/gdata/gdata_file_system.h"
+#include "chrome/browser/chromeos/gdata/gdata_file_system_interface.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace gdata {
 
 // Mock for GDataFileSystemInterface.
 class MockGDataFileSystem : public GDataFileSystemInterface {
  public:
   MockGDataFileSystem();
   virtual ~MockGDataFileSystem();
 
@@ skipping 66 matching lines @@
                                const FilePath& file,
                                scoped_ptr<DocumentEntry> entry,
                                const FilePath& file_content_path,
                                GDataCache::FileOperationType cache_operation,
                                const base::Closure& callback) OVERRIDE {}
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_MOCK_GDATA_FILE_SYSTEM_H_