components/image_fetcher: Expose RequestMetadata from ImageFetcher

components/ntp_tiles/icon_cacher_impl.h

 // 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.
 
 #ifndef COMPONENTS_NTP_TILES_ICON_CACHER_IMPL_H_
 #define COMPONENTS_NTP_TILES_ICON_CACHER_IMPL_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 10 matching lines @@
 namespace favicon_base {
 struct FaviconImageResult;
 }  // namespace favicon_base
 
 namespace gfx {
 class Image;
 }  // namespace gfx
 
 namespace image_fetcher {
 class ImageFetcher;
+struct RequestMetadata;
 }  // namespace image_fetcher
 
 namespace ntp_tiles {
 
 class IconCacherImpl : public IconCacher {
  public:
   IconCacherImpl(favicon::FaviconService* favicon_service,
                  std::unique_ptr<image_fetcher::ImageFetcher> image_fetcher);
   ~IconCacherImpl() override;
 
   void StartFetch(PopularSites::Site site,
                   const base::Closure& icon_available,
                   const base::Closure& preliminary_icon_available) override;
 
  private:
   void OnGetFaviconImageForPageURLFinished(
       PopularSites::Site site,
       const base::Closure& icon_available,
       const base::Closure& preliminary_icon_available,
       const favicon_base::FaviconImageResult& result);
 
   void OnFaviconDownloaded(PopularSites::Site site,
                            const base::Closure& icon_available,
                            const std::string& id,
-                           const gfx::Image& fetched_image);
+                           const gfx::Image& fetched_image,
+                           const image_fetcher::RequestMetadata& metadata);
 
   bool ProvideDefaultIcon(const PopularSites::Site& site);
   void SaveIconForSite(const PopularSites::Site& site, const gfx::Image image);
 
   base::CancelableTaskTracker tracker_;
   favicon::FaviconService* const favicon_service_;
   std::unique_ptr<image_fetcher::ImageFetcher> const image_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(IconCacherImpl);
 };
 
 }  // namespace ntp_tiles
 
 #endif  // COMPONENTS_NTP_TILES_ICON_CACHER_IMPL_H_