Merge of "Add attempt count metric to FaviconHandler" into M59.

components/favicon/core/favicon_handler.h

Index: components/favicon/core/favicon_handler.h
diff --git a/components/favicon/core/favicon_handler.h b/components/favicon/core/favicon_handler.h
index 9105723c8e4202ab47638d28f68ade2a76f3f3d7..24d849e0900f8c30c39c4f6cb4eaa8bbdc538e89 100644
--- a/components/favicon/core/favicon_handler.h
+++ b/components/favicon/core/favicon_handler.h
@@ -290,6 +290,10 @@ class FaviconHandler {
   // This handler's delegate.
   Delegate* delegate_;
 
+  // Captures the number of download requests that were initiated for the
+  // current url_.
+  int num_download_requests_;
+
   // The index of the favicon URL in |image_urls_| which is currently being
   // requested from history or downloaded.
   size_t current_candidate_index_;