[ew] Move operation observers from QuotaUtil to FileSystemBackend.

storage/browser/fileapi/sandbox_file_system_backend.cc

 // 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.
 
 #include "storage/browser/fileapi/sandbox_file_system_backend.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 139 matching lines @@
     FileSystemContext* context) const {
   DCHECK(CanHandleType(url.type()));
   DCHECK(delegate_);
   return delegate_->CreateFileStreamWriter(url, offset, context, url.type());
 }
 
 FileSystemQuotaUtil* SandboxFileSystemBackend::GetQuotaUtil() {
   return delegate_;
 }
 
+const UpdateObserverList* SandboxFileSystemBackend::GetUpdateObservers(
+    FileSystemType type) const {
+  return delegate_->GetUpdateObservers(type);
+}
+
+const ChangeObserverList* SandboxFileSystemBackend::GetChangeObservers(
+    FileSystemType type) const {
+  return delegate_->GetChangeObservers(type);
+}
+
+const AccessObserverList* SandboxFileSystemBackend::GetAccessObservers(
+    FileSystemType type) const {
+  return delegate_->GetAccessObservers(type);
+}
+
 SandboxFileSystemBackendDelegate::OriginEnumerator*
 SandboxFileSystemBackend::CreateOriginEnumerator() {
   DCHECK(delegate_);
   return delegate_->CreateOriginEnumerator();
 }
 
 }  // namespace storage