[ew] Move operation observers from QuotaUtil to FileSystemBackend.

storage/browser/fileapi/isolated_file_system_backend.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 STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_
 #define STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "storage/browser/fileapi/file_system_backend.h"
+#include "storage/browser/fileapi/task_runner_bound_observer_list.h"
 
 namespace storage {
 
 class AsyncFileUtilAdapter;
 
 class IsolatedFileSystemBackend : public FileSystemBackend {
  public:
   IsolatedFileSystemBackend();
   virtual ~IsolatedFileSystemBackend();
 
@@ skipping 18 matching lines @@
   virtual scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const FileSystemURL& url,
       int64 offset,
       const base::Time& expected_modification_time,
       FileSystemContext* context) const OVERRIDE;
   virtual scoped_ptr<FileStreamWriter> CreateFileStreamWriter(
       const FileSystemURL& url,
       int64 offset,
       FileSystemContext* context) const OVERRIDE;
   virtual FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
+  virtual const UpdateObserverList* GetUpdateObservers(
+      FileSystemType type) const OVERRIDE;
+  virtual const ChangeObserverList* GetChangeObservers(
+      FileSystemType type) const OVERRIDE;
+  virtual const AccessObserverList* GetAccessObservers(
+      FileSystemType type) const OVERRIDE;
 
  private:
   scoped_ptr<AsyncFileUtilAdapter> isolated_file_util_;
   scoped_ptr<AsyncFileUtilAdapter> dragged_file_util_;
   scoped_ptr<AsyncFileUtilAdapter> transient_file_util_;
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_