Change webkit/{fileapi,quota} code to use TaskRunner.

webkit/fileapi/isolated_mount_point_provider.h

Index: webkit/fileapi/isolated_mount_point_provider.h
diff --git a/webkit/fileapi/isolated_mount_point_provider.h b/webkit/fileapi/isolated_mount_point_provider.h
index 141bc94d5f71eb326d4d1d5db98c8a7de929e8d4..85553ca4f481e4e3d346cfd6e9adf2160c53e8c0 100644
--- a/webkit/fileapi/isolated_mount_point_provider.h
+++ b/webkit/fileapi/isolated_mount_point_provider.h
@@ -45,12 +45,12 @@ class IsolatedMountPointProvider : public FileSystemMountPointProvider {
       const GURL& origin_url,
       FileSystemType file_system_type,
       const FilePath& virtual_path,
-      base::MessageLoopProxy* file_proxy,
+      base::SequencedTaskRunner* task_runner,
       FileSystemContext* context) const OVERRIDE;
   virtual webkit_blob::FileReader* CreateFileReader(
     const GURL& url,
     int64 offset,
-    base::MessageLoopProxy* file_proxy,
+    base::SequencedTaskRunner* task_runner,
     FileSystemContext* context) const OVERRIDE;
 
  private: