[ew] Move operation observers from QuotaUtil to FileSystemBackend.

chrome/browser/media_galleries/fileapi/media_file_system_backend.h

Index: chrome/browser/media_galleries/fileapi/media_file_system_backend.h
diff --git a/chrome/browser/media_galleries/fileapi/media_file_system_backend.h b/chrome/browser/media_galleries/fileapi/media_file_system_backend.h
index 1d3ec72c936c0c421f0aed659e00e265f4918fc3..a1e1ec795272d9079d738d5de70755161ac5c5b7 100644
--- a/chrome/browser/media_galleries/fileapi/media_file_system_backend.h
+++ b/chrome/browser/media_galleries/fileapi/media_file_system_backend.h
@@ -13,6 +13,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/media_galleries/media_galleries_preferences.h"
 #include "storage/browser/fileapi/file_system_backend.h"
+#include "storage/browser/fileapi/task_runner_bound_observer_list.h"
 
 namespace base {
 class SequencedTaskRunner;
@@ -84,6 +85,12 @@ class MediaFileSystemBackend : public storage::FileSystemBackend {
       int64 offset,
       storage::FileSystemContext* context) const OVERRIDE;
   virtual storage::FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
+  virtual const storage::UpdateObserverList* GetUpdateObservers(
+      storage::FileSystemType type) const OVERRIDE;
+  virtual const storage::ChangeObserverList* GetChangeObservers(
+      storage::FileSystemType type) const OVERRIDE;
+  virtual const storage::AccessObserverList* GetAccessObservers(
+      storage::FileSystemType type) const OVERRIDE;
 
  private:
   // Store the profile path. We need this to create temporary snapshot files.