gdata: Fix GDataFileSystem::GetCacheStateOnUIThread to acquire lock for cache initialization.

chrome/browser/chromeos/gdata/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_GDATA_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 #pragma once
 
 #include <sys/stat.h>
 
@@ skipping 1136 matching lines @@
   void FreeDiskSpaceIfNeeded(bool* has_enough_space);
 
   // Starts downloading a file if we have enough disk space indicated by
   // |has_enough_space|.
   void StartDownloadFileIfEnoughSpace(const GetFileFromCacheParams& params,
                                       const FilePath& cache_file_path,
                                       bool* has_enough_space);
 
   // Cache internal helper functions.
 
-  // Unsafe (unlocked) version of InitializeCacheIfnecessary method.
-  void UnsafeInitializeCacheIfNecessary();

[satorux1, 2012/04/30 06:22:09]

one less function is great!

-
   // Scans cache subdirectory |sub_dir_type| and build or update |cache_map|
   // with found file blobs or symlinks.
   void ScanCacheDirectory(
       GDataRootDirectory::CacheSubDirectoryType sub_dir_type,
       GDataRootDirectory::CacheMap* cache_map);
 
   // Wrapper task around any sequenced task that runs on IO thread pool that
   // makes sure |in_shutdown_| and |on_io_completed_| are handled properly in
   // the right order.
   void RunTaskOnIOThreadPool(const base::Closure& task);
@@ skipping 124 matching lines @@
 };
 
 // Sets the free disk space getter for testing.
 // The existing getter is deleted.
 void SetFreeDiskSpaceGetterForTesting(
     FreeDiskSpaceGetterInterface* getter);
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_