SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/sandbox_file_system_backend.h

Index: webkit/browser/fileapi/sandbox_file_system_backend.h
diff --git a/webkit/browser/fileapi/sandbox_file_system_backend.h b/webkit/browser/fileapi/sandbox_file_system_backend.h
index ffd41c1694dcc0a1c56664259a6ad12ff125cacd..629cb0d861fbaa131258bf6eb451b0abd05151c4 100644
--- a/webkit/browser/fileapi/sandbox_file_system_backend.h
+++ b/webkit/browser/fileapi/sandbox_file_system_backend.h
@@ -166,6 +166,30 @@ class WEBKIT_STORAGE_BROWSER_EXPORT SandboxFileSystemBackend
     enable_temporary_file_system_in_incognito_ = enable;
   }
 
+ protected:
+  SandboxContext* sandbox_context() { return sandbox_context_; }
+  void set_sandbox_context(SandboxContext* sandbox_context) {
+    sandbox_context_ = sandbox_context;
+  }
+
+  const UpdateObserverList* update_observers() const {
+    return &update_observers_;
+  }
+  void set_update_observers(const UpdateObserverList& update_observers) {
+    update_observers_ = update_observers;
+  }
+
+  const ChangeObserverList* change_observers() const {
+    return &change_observers_;
+  }
+
+  const AccessObserverList* access_observers() const {
+    return &access_observers_;
+  }
+  void set_access_observers(const AccessObserverList& access_observers) {
+    access_observers_ = access_observers;
+  }
+
  private:
   friend class SandboxQuotaObserver;
   friend class SandboxFileSystemTestHelper;
@@ -214,10 +238,6 @@ class WEBKIT_STORAGE_BROWSER_EXPORT SandboxFileSystemBackend
   ChangeObserverList change_observers_;
   AccessObserverList access_observers_;
 
-  // Observers for syncable file systems.
-  UpdateObserverList syncable_update_observers_;
-  ChangeObserverList syncable_change_observers_;
-
   base::Time next_release_time_for_open_filesystem_stat_;
 
   std::set<std::pair<GURL, FileSystemType> > sticky_dirty_origins_;