Use IOSImageDataFetcherWrapper for favicon

components/image_fetcher/image_data_fetcher.h

Index: components/image_fetcher/image_data_fetcher.h
diff --git a/components/image_fetcher/image_data_fetcher.h b/components/image_fetcher/image_data_fetcher.h
index 5383086a519b2aa37324ab4335a5df99ef229d1e..70afd686af3997e180b58fa7ea1fced6788aa1d3 100644
--- a/components/image_fetcher/image_data_fetcher.h
+++ b/components/image_fetcher/image_data_fetcher.h
@@ -27,7 +27,8 @@ namespace image_fetcher {
 class ImageDataFetcher : public net::URLFetcherDelegate {
  public:
   using ImageDataFetcherCallback =
-      base::Callback<void(const std::string& image_data)>;
+      base::Callback<void(const std::string& image_data,
+                          int http_response_code)>;
 
   using DataUseServiceName = data_use_measurement::DataUseUserData::ServiceName;