Add support for favicon scale factor in WebUI

chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js

Index: chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js
diff --git a/chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js b/chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js
index c598feb88df8052b242b0602d568ce4a4c2715f0..92c83f460c5b73db9f2e58c2b284c2a277616c5a 100644
--- a/chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js
+++ b/chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.js
@@ -389,8 +389,8 @@ cr.define('bmm', function() {
       if (bmm.isFolder(bookmarkNode)) {
         this.className = 'folder';
       } else {
-        labelEl.style.backgroundImage = url('chrome://favicon/' +
-                                            bookmarkNode.url);
+        labelEl.style.backgroundImage = url(getFaviconURL(bookmarkNode.url));
+        labelEl.style.backgroundSize = '16px';
         urlEl.textContent = bookmarkNode.url;
       }