net: Use SequencedTaskRunner for URLFetcherResponseWriter

net/url_request/url_fetcher_impl.h

Index: net/url_request/url_fetcher_impl.h
diff --git a/net/url_request/url_fetcher_impl.h b/net/url_request/url_fetcher_impl.h
index ec72d1a21c4e2dff415117b37a0c16b128ed556b..fe0362b3aeac790d8cf3761bb31a6403feb1386f 100644
--- a/net/url_request/url_fetcher_impl.h
+++ b/net/url_request/url_fetcher_impl.h
@@ -70,9 +70,9 @@ class NET_EXPORT_PRIVATE URLFetcherImpl : public URLFetcher {
   virtual void SetAutomaticallyRetryOnNetworkChanges(int max_retries) OVERRIDE;
   virtual void SaveResponseToFileAtPath(
       const base::FilePath& file_path,
-      scoped_refptr<base::TaskRunner> file_task_runner) OVERRIDE;
+      scoped_refptr<base::SequencedTaskRunner> file_task_runner) OVERRIDE;
   virtual void SaveResponseToTemporaryFile(
-      scoped_refptr<base::TaskRunner> file_task_runner) OVERRIDE;
+      scoped_refptr<base::SequencedTaskRunner> file_task_runner) OVERRIDE;
   virtual void SaveResponseWithWriter(
       scoped_ptr<URLFetcherResponseWriter> response_writer) OVERRIDE;
   virtual HttpResponseHeaders* GetResponseHeaders() const OVERRIDE;