components/image_fetcher: Expose RequestMetadata from ImageFetcher

components/ntp_snippets/remote/remote_suggestions_provider_impl.h

 // Copyright 2015 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_SNIPPETS_REMOTE_REMOTE_SUGGESTIONS_PROVIDER_IMPL_H_
 #define COMPONENTS_NTP_SNIPPETS_REMOTE_REMOTE_SUGGESTIONS_PROVIDER_IMPL_H_
 
 #include <cstddef>
 #include <deque>
 #include <map>
@@ skipping 22 matching lines @@
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace gfx {
 class Image;
 }  // namespace gfx
 
 namespace image_fetcher {
 class ImageFetcher;
+struct RequestMetadata;
 }  // namespace image_fetcher
 
 namespace ntp_snippets {
 
 class CategoryRanker;
 class RemoteSuggestionsDatabase;
 class RemoteSuggestionsScheduler;
 
 // CachedImageFetcher takes care of fetching images from the network and caching
 // them in the database.
@@ skipping 16 matching lines @@
                             const GURL& image_url,
                             const ImageFetchedCallback& callback);
 
  private:
   // image_fetcher::ImageFetcherDelegate implementation.
   void OnImageDataFetched(const std::string& id_within_category,
                           const std::string& image_data) override;
 
   void OnImageDecodingDone(const ImageFetchedCallback& callback,
                            const std::string& id_within_category,
-                           const gfx::Image& image);
+                           const gfx::Image& image,
+                           const image_fetcher::RequestMetadata& metadata);
   void OnImageFetchedFromDatabase(
       const ImageFetchedCallback& callback,
       const ContentSuggestion::ID& suggestion_id,
       const GURL& image_url,
       // SnippetImageCallback requires by-value (not const ref).
       std::string data);
   void OnImageDecodedFromDatabase(const ImageFetchedCallback& callback,
                                   const ContentSuggestion::ID& suggestion_id,
                                   const GURL& url,
                                   const gfx::Image& image);
@@ skipping 369 matching lines @@
 
   // A clock for getting the time. This allows to inject a clock in tests.
   std::unique_ptr<base::Clock> clock_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteSuggestionsProviderImpl);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_REMOTE_REMOTE_SUGGESTIONS_PROVIDER_IMPL_H_