Remove preferences among favicon types when choosing large icons

components/favicon/core/large_icon_service.h

Index: components/favicon/core/large_icon_service.h
diff --git a/components/favicon/core/large_icon_service.h b/components/favicon/core/large_icon_service.h
index 7207e605ac3613ae57d6f8399799cf7d866d208a..2162f4392d2d46282c05f60ac71c899074568a5c 100644
--- a/components/favicon/core/large_icon_service.h
+++ b/components/favicon/core/large_icon_service.h
@@ -97,11 +97,6 @@ class LargeIconService : public KeyedService {
   FaviconService* favicon_service_;
   scoped_refptr<base::TaskRunner> background_task_runner_;
 
-  // A pre-populated list of icon types to consider when looking for large
-  // icons. This is an optimization over populating an icon type vector on each
-  // request.
-  std::vector<int> large_icon_types_;
-
   std::unique_ptr<image_fetcher::ImageFetcher> image_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(LargeIconService);