Popular sites on the NTP: add thumbnails!

components/suggestions/suggestions_service.h

 // Copyright 2014 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_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 #define COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 55 matching lines @@
   //
   // If state allows for a network request, it is initiated unless a pending one
   // exists, to fill the cache for next time.
   void FetchSuggestionsData(SyncState sync_state,
                             ResponseCallback callback);
 
   // Retrieves stored thumbnail for website |url| asynchronously. Calls
   // |callback| with Bitmap pointer if found, and NULL otherwise.
   void GetPageThumbnail(
       const GURL& url,
-      base::Callback<void(const GURL&, const SkBitmap*)> callback);
+      const base::Callback<void(const GURL&, const SkBitmap*)>& callback);
+
+  // A version of |GetPageThumbnail| that explicitly supplies the download URL
+  // for the thumbnail. Replaces any pre-existing thumbnail URL with the
+  // supplied one.
+  void GetPageThumbnailWithURL(
+      const GURL& url,
+      const GURL& thumbnail_url,
+      const base::Callback<void(const GURL&, const SkBitmap*)>& callback);
 
   // Adds a URL to the blacklist cache, invoking |callback| on success or
   // |fail_callback| otherwise. The URL will eventually be uploaded to the
   // server.
   void BlacklistURL(const GURL& candidate_url,
                     const ResponseCallback& callback,
                     const base::Closure& fail_callback);
 
   // Removes a URL from the local blacklist, then invokes |callback|. If the URL
   // cannot be removed, the |fail_callback| is called.
@@ skipping 100 matching lines @@
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<SuggestionsService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestionsService);
 };
 
 }  // namespace suggestions
 
 #endif  // COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_