Remove drive::FileSystemInterface::Initialize().

chrome/browser/chromeos/drive/file_system_interface.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_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 148 matching lines @@
   SEARCH_METADATA_SHARED_WITH_ME = 1 << 2,
   SEARCH_METADATA_OFFLINE = 1 << 3,
 };
 
 // Drive file system abstraction layer.
 // The interface is defined to make FileSystem mockable.
 class FileSystemInterface {
  public:
   virtual ~FileSystemInterface() {}
 
-  // Initializes the object. This function should be called before any
-  // other functions.
-  virtual void Initialize() = 0;
-
   // Adds and removes the observer.
   virtual void AddObserver(FileSystemObserver* observer) = 0;
   virtual void RemoveObserver(FileSystemObserver* observer) = 0;
 
   // Checks for updates on the server.
   virtual void CheckForUpdates() = 0;
 
   // Initiates transfer of |local_src_file_path| to |remote_dest_file_path|.
   // |local_src_file_path| must be a file from the local file system.
   // |remote_dest_file_path| is the virtual destination path within Drive file
@@ skipping 238 matching lines @@
   virtual void GetCacheEntryByPath(const base::FilePath& drive_file_path,
                                    const GetCacheEntryCallback& callback) = 0;
 
   // Reloads the resource metadata from the server.
   virtual void Reload(const FileOperationCallback& callback) = 0;
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_INTERFACE_H_