Use IOSImageDataFetcherWrapper for favicon

components/image_fetcher/image_data_fetcher.cc

Index: components/image_fetcher/image_data_fetcher.cc
diff --git a/components/image_fetcher/image_data_fetcher.cc b/components/image_fetcher/image_data_fetcher.cc
index e82c36751dfec9d43909a5a98fca1e5af81d25f6..0af740f4360672b22e76495cd0ffda647194812f 100644
--- a/components/image_fetcher/image_data_fetcher.cc
+++ b/components/image_fetcher/image_data_fetcher.cc
@@ -77,11 +77,13 @@ void ImageDataFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
   auto request_iter = pending_requests_.find(source);
   DCHECK(request_iter != pending_requests_.end());
 
+  int response_code = source->GetResponseCode();
+
   std::string image_data;
   if (source->GetStatus().status() == net::URLRequestStatus::SUCCESS) {
     source->GetResponseAsString(&image_data);
   }
-  request_iter->second->callback.Run(image_data);
+  request_iter->second->callback.Run(image_data, response_code);
 
   // Remove the finished request.
   pending_requests_.erase(request_iter);