SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/isolated_mount_point_provider.cc

Index: webkit/browser/fileapi/isolated_mount_point_provider.cc
diff --git a/webkit/browser/fileapi/isolated_mount_point_provider.cc b/webkit/browser/fileapi/isolated_mount_point_provider.cc
index 362c52836c950c9c68ebf25556d767bb3e8299c0..b2bc6cd6e0b482a9ece62a2dbaabd243e4bff78d 100644
--- a/webkit/browser/fileapi/isolated_mount_point_provider.cc
+++ b/webkit/browser/fileapi/isolated_mount_point_provider.cc
@@ -56,6 +56,13 @@ bool IsolatedMountPointProvider::CanHandleType(FileSystemType type) const {
   }
 }
 
+GURL IsolatedMountPointProvider::GetRootURI(const GURL& origin_url,
+                                            FileSystemType type) const {
+  if (!CanHandleType(type))
+    return GURL();
+  return GetFileSystemRootURI(origin_url, type);
+}
+
 void IsolatedMountPointProvider::OpenFileSystem(
     const GURL& origin_url,
     FileSystemType type,
@@ -138,4 +145,10 @@ FileSystemQuotaUtil* IsolatedMountPointProvider::GetQuotaUtil() {
   return NULL;
 }
 
+const UpdateObserverList*
+IsolatedMountPointProvider::GetUpdateObservers(FileSystemType type) const {
+  // No update observer support.
+  return NULL;
+}
+
 }  // namespace fileapi