[NTP Tiles] Fetch missing MostLikely tiles from a Google server

components/ntp_tiles/icon_cacher_impl.h

Index: components/ntp_tiles/icon_cacher_impl.h
diff --git a/components/ntp_tiles/icon_cacher_impl.h b/components/ntp_tiles/icon_cacher_impl.h
index 58ed735eb653b1a63dd899393fc0049190c55db9..52bd3fd373dcaa3397ddbcea0dd6a0872e57ac40 100644
--- a/components/ntp_tiles/icon_cacher_impl.h
+++ b/components/ntp_tiles/icon_cacher_impl.h
@@ -17,10 +17,12 @@
 
 namespace favicon {
 class FaviconService;
+class LargeIconService;
 }  // namespace favicon
 
 namespace favicon_base {
 struct FaviconImageResult;
+struct LargeIconResult;
 }  // namespace favicon_base
 
 namespace gfx {
@@ -36,13 +38,19 @@ namespace ntp_tiles {
 
 class IconCacherImpl : public IconCacher {
  public:
+  // TODO(jkrcal): Make this eventually use only LargeIconService.
+  // crbug.com/696563
   IconCacherImpl(favicon::FaviconService* favicon_service,
+                 favicon::LargeIconService* large_icon_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;
+  void StartFetchPopularSites(
+      PopularSites::Site site,
+      const base::Closure& icon_available,
+      const base::Closure& preliminary_icon_available) override;
+  void StartFetchMostLikely(const GURL& page_url,
+                            const base::Closure& icon_available) override;
 
  private:
   using CancelableImageCallback =
@@ -54,7 +62,7 @@ class IconCacherImpl : public IconCacher {
       const base::Closure& preliminary_icon_available,
       const favicon_base::FaviconImageResult& result);
 
-  void OnFaviconDownloaded(
+  void OnPopularSitesFaviconDownloaded(
       PopularSites::Site site,
       std::unique_ptr<CancelableImageCallback> preliminary_callback,
       const base::Closure& icon_available,
@@ -69,8 +77,17 @@ class IconCacherImpl : public IconCacher {
                                 const base::Closure& icon_available,
                                 const gfx::Image& image);
 
+  void OnGetLargeIconOrFallbackStyleFinished(
+      const GURL& page_url,
+      const base::Closure& icon_available,
+      const favicon_base::LargeIconResult& result);
+
+  void OnMostLikelyFaviconDownloaded(const base::Closure& icon_available,
+                                     bool success);
+
   base::CancelableTaskTracker tracker_;
   favicon::FaviconService* const favicon_service_;
+  favicon::LargeIconService* const large_icon_service_;
   std::unique_ptr<image_fetcher::ImageFetcher> const image_fetcher_;
 
   base::WeakPtrFactory<IconCacherImpl> weak_ptr_factory_;