Remove drive::FileSystemInterface::Initialize().

chrome/browser/chromeos/drive/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_DRIVE_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
   FileSystem(PrefService* pref_service,
              internal::FileCache* cache,
              DriveServiceInterface* drive_service,
              JobScheduler* scheduler,
              internal::ResourceMetadata* resource_metadata,
              base::SequencedTaskRunner* blocking_task_runner,
              const base::FilePath& temporary_file_directory);
   virtual ~FileSystem();
 
   // FileSystemInterface overrides.
-  virtual void Initialize() OVERRIDE;
   virtual void AddObserver(FileSystemObserver* observer) OVERRIDE;
   virtual void RemoveObserver(FileSystemObserver* observer) OVERRIDE;
   virtual void CheckForUpdates() OVERRIDE;
   virtual void Search(const std::string& search_query,
                       const GURL& next_link,
                       const SearchCallback& callback) OVERRIDE;
   virtual void SearchMetadata(const std::string& query,
                               int options,
                               int at_most_num_matches,
                               const SearchMetadataCallback& callback) OVERRIDE;
@@ skipping 221 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<FileSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystem);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_