[ew] Move operation observers from QuotaUtil to FileSystemBackend.

chrome/browser/sync_file_system/local/sync_file_system_backend.cc

Index: chrome/browser/sync_file_system/local/sync_file_system_backend.cc
diff --git a/chrome/browser/sync_file_system/local/sync_file_system_backend.cc b/chrome/browser/sync_file_system/local/sync_file_system_backend.cc
index ef46ac5b85c4a5c7f8baee4851e8c822d8b8d3d4..d1841f65b236f3138d2b94ad5bf26c7ee0626761 100644
--- a/chrome/browser/sync_file_system/local/sync_file_system_backend.cc
+++ b/chrome/browser/sync_file_system/local/sync_file_system_backend.cc
@@ -211,6 +211,21 @@ storage::FileSystemQuotaUtil* SyncFileSystemBackend::GetQuotaUtil() {
   return GetDelegate();
 }
 
+const storage::UpdateObserverList* SyncFileSystemBackend::GetUpdateObservers(
+    storage::FileSystemType type) const {
+  return GetDelegate()->GetUpdateObservers(type);
+}
+
+const storage::ChangeObserverList* SyncFileSystemBackend::GetChangeObservers(
+    storage::FileSystemType type) const {
+  return GetDelegate()->GetChangeObservers(type);
+}
+
+const storage::AccessObserverList* SyncFileSystemBackend::GetAccessObservers(
+    storage::FileSystemType type) const {
+  return GetDelegate()->GetAccessObservers(type);
+}
+
 // static
 SyncFileSystemBackend* SyncFileSystemBackend::GetBackend(
     const storage::FileSystemContext* file_system_context) {