Use IOSImageDataFetcherWrapper for favicon

components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h

Index: components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h
diff --git a/components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h b/components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h
index 81b5f70dbdfccfb4c9b31f2289a0bb31ca6eae3c..3f49cc5b5c3f22e27c736ba2053420c8fdc1c8ef 100644
--- a/components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h
+++ b/components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h
@@ -23,8 +23,10 @@ class GURL;
 
 namespace image_fetcher {
 
-// Callback that informs of the download of an image encoded in |data|.
-using IOSImageDataFetcherCallback = void (^)(NSData* data);
+// Callback that informs of the download of an image encoded in |data| with the
+// http |response_code| of the download.
+using IOSImageDataFetcherCallback = void (^)(NSData* data,
+                                             const int response_code);

[sdefresne, 2017/02/06 17:33:34]

Remove "const" here. It is not really necessary (it has some use in the
implementation but none in the declaration).

[gambard, 2017/02/07 10:03:33]

Done.

 
 class IOSImageDataFetcherWrapper {
  public: