Add URLFetcher::SaveResponseToFileAtPath

content/public/common/url_fetcher.h

Index: content/public/common/url_fetcher.h
diff --git a/content/public/common/url_fetcher.h b/content/public/common/url_fetcher.h
index 571a34bc85624b09e67fca77634229174a9a999f..2bd3bef976153ca302d52ec1e55c0efafa65ba8e 100644
--- a/content/public/common/url_fetcher.h
+++ b/content/public/common/url_fetcher.h
@@ -169,6 +169,13 @@ class CONTENT_EXPORT URLFetcher {
   virtual base::TimeDelta GetBackoffDelay() const = 0;
 
   // By default, the response is saved in a string. Call this method to save the
+  // response to a file instead. Must be called before Start().
+  // |file_message_loop_proxy| will be used for all file operations.

[Sam Kerner (Chrome), 2012/03/06 00:23:06]

Add something like: 
// To save to a temporary path, use SaveResponseToTemporaryFile().

[hashimoto, 2012/03/06 10:16:01]

Done.

+  virtual void SaveResponseToFile(
+      const FilePath& file_path,
+      scoped_refptr<base::MessageLoopProxy> file_message_loop_proxy) = 0;
+
+  // By default, the response is saved in a string. Call this method to save the
   // response to a temporary file instead. Must be called before Start().
   // |file_message_loop_proxy| will be used for all file operations.
   virtual void SaveResponseToTemporaryFile(