SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/isolated_mount_point_provider.h

Index: webkit/browser/fileapi/isolated_mount_point_provider.h
diff --git a/webkit/browser/fileapi/isolated_mount_point_provider.h b/webkit/browser/fileapi/isolated_mount_point_provider.h
index 449ecf56db694a69c45c2c75d5df0eddfbf89eca..1c4ce1e0bd985bf7f2201c8ea806f11700c8efce 100644
--- a/webkit/browser/fileapi/isolated_mount_point_provider.h
+++ b/webkit/browser/fileapi/isolated_mount_point_provider.h
@@ -19,6 +19,8 @@ class IsolatedMountPointProvider : public FileSystemMountPointProvider {
 
   // FileSystemMountPointProvider implementation.
   virtual bool CanHandleType(FileSystemType type) const OVERRIDE;
+  virtual GURL GetRootURI(const GURL& origin_url,
+                          FileSystemType type) const OVERRIDE;
   virtual void OpenFileSystem(
       const GURL& origin_url,
       FileSystemType type,
@@ -43,6 +45,8 @@ class IsolatedMountPointProvider : public FileSystemMountPointProvider {
       int64 offset,
       FileSystemContext* context) const OVERRIDE;
   virtual FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
+  virtual const UpdateObserverList* GetUpdateObservers(
+      FileSystemType type) const OVERRIDE;
 
  private:
   scoped_ptr<AsyncFileUtilAdapter> isolated_file_util_;