Introduce a Doodle Fetcher for NTP

chrome/browser/search/instant_service.h

 // Copyright 2013 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 CHROME_BROWSER_SEARCH_INSTANT_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_INSTANT_SERVICE_H_
 
 #include <memory>
 #include <set>
 #include <vector>
@@ skipping 16 matching lines @@
 
 class InstantIOContext;
 struct InstantMostVisitedItem;
 class InstantSearchPrerenderer;
 class InstantServiceObserver;
 class Profile;
 struct TemplateURLData;
 class TemplateURLService;
 struct ThemeBackgroundInfo;
 
+namespace doodle {
+class DoodleFetcher;
+}
+
 namespace content {
 class RenderProcessHost;
 }
 
 namespace history {
 class TopSites;
 }
 
 // Tracks render process host IDs that are associated with Instant.
 class InstantService : public KeyedService,
@@ skipping 132 matching lines @@
 
   // Used to check whether notifications from TemplateURLService indicate a
   // change that affects the default search provider.
   std::unique_ptr<TemplateURLData> previous_default_search_provider_;
   GURL previous_google_base_url_;
 
   // Data sources for NTP tiles (aka Most Visited tiles). Only one of these will
   // be non-null.
   std::unique_ptr<ntp_tiles::MostVisitedSites> most_visited_sites_;
   scoped_refptr<history::TopSites> top_sites_;
+  std::unique_ptr<doodle::DoodleFetcher> doodle_fetcher_;
 
   // Used for Top Sites async retrieval.
   base::WeakPtrFactory<InstantService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_INSTANT_SERVICE_H_