Find Favicon in priority of icon_type.

chrome/browser/favicon/favicon_service.h

Index: chrome/browser/favicon/favicon_service.h
diff --git a/chrome/browser/favicon/favicon_service.h b/chrome/browser/favicon/favicon_service.h
index 692a6ebe74e1d570670da09befcfc51ec8658a50..d14a96320d863c8e4eb085be225bc1fe049f68ae 100644
--- a/chrome/browser/favicon/favicon_service.h
+++ b/chrome/browser/favicon/favicon_service.h
@@ -172,6 +172,15 @@ class FaviconService : public CancelableRequestProvider,
       const FaviconRawCallback& callback,
       CancelableTaskTracker* tracker);
 
+  // See HistoryService::GetLargestFaviconForURL().
+  CancelableTaskTracker::TaskId GetLargestRawFaviconForURL(
+      Profile* profile,
+      const GURL& page_url,
+      const std::vector<int>& icon_types,
+      int minimum_size_in_pixels,
+      const FaviconRawCallback& callback,
+      CancelableTaskTracker* tracker);
+
   CancelableTaskTracker::TaskId GetFaviconForURL(
       const FaviconForURLParams& params,
       const FaviconResultsCallback& callback,