components/image_fetcher: Expose RequestMetadata from ImageFetcher

components/ntp_tiles/icon_cacher_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/ntp_tiles/icon_cacher_impl.h"
 
 #include <utility>
 
 #include "components/favicon/core/favicon_service.h"
 #include "components/favicon/core/favicon_util.h"
@@ skipping 60 matching lines @@
   if (ProvideDefaultIcon(site) && !preliminary_icon_available.is_null()) {
     preliminary_icon_available.Run();
   }
 
   image_fetcher_->StartOrQueueNetworkRequest(
       std::string(), IconURL(site),
       base::Bind(&IconCacherImpl::OnFaviconDownloaded, base::Unretained(this),
                  site, icon_available));
 }
 
-void IconCacherImpl::OnFaviconDownloaded(PopularSites::Site site,
-                                         const base::Closure& icon_available,
-                                         const std::string& id,
-                                         const gfx::Image& fetched_image) {
+void IconCacherImpl::OnFaviconDownloaded(
+    PopularSites::Site site,
+    const base::Closure& icon_available,
+    const std::string& id,
+    const gfx::Image& fetched_image,
+    const image_fetcher::RequestMetadata& metadata) {
   if (fetched_image.IsEmpty()) {
     return;
   }
 
   SaveIconForSite(site, fetched_image);
   if (icon_available) {
     icon_available.Run();
   }
 }
 
 void IconCacherImpl::SaveIconForSite(const PopularSites::Site& site,
                                      gfx::Image image) {
   favicon_base::SetFaviconColorSpace(&image);
   favicon_service_->SetFavicons(site.url, IconURL(site), IconType(site), image);
 }
 
 bool IconCacherImpl::ProvideDefaultIcon(const PopularSites::Site& site) {
   if (site.default_icon_resource < 0) {
     return false;
   }
   SaveIconForSite(site, ResourceBundle::GetSharedInstance().GetNativeImageNamed(
                             site.default_icon_resource));
   return true;
 }
 
 }  // namespace ntp_tiles