[ew] Move operation observers from QuotaUtil to FileSystemBackend.

storage/browser/fileapi/sandbox_file_system_backend_delegate.h

Index: storage/browser/fileapi/sandbox_file_system_backend_delegate.h
diff --git a/storage/browser/fileapi/sandbox_file_system_backend_delegate.h b/storage/browser/fileapi/sandbox_file_system_backend_delegate.h
index d93badae01fbf06c49103614dccbcfe13bd990e8..dfb5678a3fa4d8613c205cba8e2c3ef462024b33 100644
--- a/storage/browser/fileapi/sandbox_file_system_backend_delegate.h
+++ b/storage/browser/fileapi/sandbox_file_system_backend_delegate.h
@@ -20,6 +20,7 @@
 #include "storage/browser/fileapi/file_system_backend.h"
 #include "storage/browser/fileapi/file_system_options.h"
 #include "storage/browser/fileapi/file_system_quota_util.h"
+#include "storage/browser/fileapi/task_runner_bound_observer_list.h"
 #include "storage/browser/storage_browser_export.h"
 
 namespace base {
@@ -146,24 +147,26 @@ class STORAGE_EXPORT SandboxFileSystemBackendDelegate
       CreateQuotaReservationOnFileTaskRunner(
           const GURL& origin_url,
           FileSystemType type) OVERRIDE;
-  virtual void AddFileUpdateObserver(
-      FileSystemType type,
-      FileUpdateObserver* observer,
-      base::SequencedTaskRunner* task_runner) OVERRIDE;
-  virtual void AddFileChangeObserver(
-      FileSystemType type,
-      FileChangeObserver* observer,
-      base::SequencedTaskRunner* task_runner) OVERRIDE;
-  virtual void AddFileAccessObserver(
-      FileSystemType type,
-      FileAccessObserver* observer,
-      base::SequencedTaskRunner* task_runner) OVERRIDE;
+
+  // Adds an observer for the secified |type| of a file system, bound to
+  // |task_runner|.
+  virtual void AddFileUpdateObserver(FileSystemType type,
+                                     FileUpdateObserver* observer,
+                                     base::SequencedTaskRunner* task_runner);
+  virtual void AddFileChangeObserver(FileSystemType type,
+                                     FileChangeObserver* observer,
+                                     base::SequencedTaskRunner* task_runner);
+  virtual void AddFileAccessObserver(FileSystemType type,
+                                     FileAccessObserver* observer,
+                                     base::SequencedTaskRunner* task_runner);
+
+  // Returns observer lists for the specified |type| of a file system.
   virtual const UpdateObserverList* GetUpdateObservers(
-      FileSystemType type) const OVERRIDE;
+      FileSystemType type) const;
   virtual const ChangeObserverList* GetChangeObservers(
-      FileSystemType type) const OVERRIDE;
+      FileSystemType type) const;
   virtual const AccessObserverList* GetAccessObservers(
-      FileSystemType type) const OVERRIDE;
+      FileSystemType type) const;
 
   // Registers quota observer for file updates on filesystem of |type|.
   void RegisterQuotaUpdateObserver(FileSystemType type);