drive: Support offline delete

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 141 matching lines @@
   virtual void GetCacheEntry(
       const base::FilePath& drive_file_path,
       const GetCacheEntryCallback& callback) OVERRIDE;
   virtual void Reload(const FileOperationCallback& callback) OVERRIDE;
 
   // file_system::OperationObserver overrides.
   virtual void OnDirectoryChangedByOperation(
       const base::FilePath& directory_path) OVERRIDE;
   virtual void OnCacheFileUploadNeededByOperation(
       const std::string& local_id) OVERRIDE;
+  virtual void OnEntryRemovedByOperation(const std::string& local_id) OVERRIDE;
 
   // ChangeListLoader::Observer overrides.
   // Used to propagate events from ChangeListLoader.
   virtual void OnDirectoryChanged(
       const base::FilePath& directory_path) OVERRIDE;
   virtual void OnLoadFromServerComplete() OVERRIDE;
   virtual void OnInitialLoadComplete() OVERRIDE;
 
   // Used by tests.
   internal::ChangeListLoader* change_list_loader_for_testing() {
@@ skipping 126 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_