Fix WeakPtrFactory member order in net/url_request/

net/url_request/url_fetcher_response_writer.h

Index: net/url_request/url_fetcher_response_writer.h
diff --git a/net/url_request/url_fetcher_response_writer.h b/net/url_request/url_fetcher_response_writer.h
index 422a8a400adbfa76aeb5f17929c13b313260dbed..651e95c619ec8336cef08b525ce07bc1583533f1 100644
--- a/net/url_request/url_fetcher_response_writer.h
+++ b/net/url_request/url_fetcher_response_writer.h
@@ -119,9 +119,6 @@ class NET_EXPORT URLFetcherFileWriter : public URLFetcherResponseWriter {
   // Callback which gets the result of closing a file.
   void CloseComplete(const CompletionCallback& callback, int result);
 
-  // Callbacks are created for use with base::FileUtilProxy.
-  base::WeakPtrFactory<URLFetcherFileWriter> weak_factory_;
-
   // Task runner on which file operations should happen.
   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
 
@@ -134,6 +131,9 @@ class NET_EXPORT URLFetcherFileWriter : public URLFetcherResponseWriter {
 
   scoped_ptr<FileStream> file_stream_;
 
+  // Callbacks are created for use with base::FileUtilProxy.
+  base::WeakPtrFactory<URLFetcherFileWriter> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(URLFetcherFileWriter);
 };