Treat touch icons just like non-touch icons on mobile

components/favicon/core/favicon_driver_impl.h

Index: components/favicon/core/favicon_driver_impl.h
diff --git a/components/favicon/core/favicon_driver_impl.h b/components/favicon/core/favicon_driver_impl.h
index 190863670b17a6f08735e56833381c0a5b6ccc98..a00cc93b223a29a4e34f74436593afb10a1284e9 100644
--- a/components/favicon/core/favicon_driver_impl.h
+++ b/components/favicon/core/favicon_driver_impl.h
@@ -75,9 +75,7 @@ class FaviconDriverImpl : public FaviconDriver,
   bookmarks::BookmarkModel* bookmark_model_;
 
   // FaviconHandlers used to download the different kind of favicons.
-  // |touch_icon_handler_| may be null depending on the platform and variations.
   std::unique_ptr<FaviconHandler> favicon_handler_;
-  std::unique_ptr<FaviconHandler> touch_icon_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconDriverImpl);
 };