[New Tab Page] Local NTP: bound the size of favicon image.

chrome/browser/resources/local_ntp/most_visited_single.css

Index: chrome/browser/resources/local_ntp/most_visited_single.css
diff --git a/chrome/browser/resources/local_ntp/most_visited_single.css b/chrome/browser/resources/local_ntp/most_visited_single.css
index d79a7f841b3109450acacc4c6822ababc816bba7..2fe9ad4fbc412689a3d45747bbe774a3091b43ac 100644
--- a/chrome/browser/resources/local_ntp/most_visited_single.css
+++ b/chrome/browser/resources/local_ntp/most_visited_single.css
@@ -368,6 +368,11 @@ html[dir=rtl] .mv-favicon {
   background-size: 16px 16px;
 }
 
+.mv-favicon img {
+  height: 100%;
+  width: 100%;
+}
+
 .mv-favicon.failed-favicon img {
   display: none;
 }