Polymer WebUI: Enable native CSS custom properties

chrome/browser/resources/md_downloads/crisper.js

Index: chrome/browser/resources/md_downloads/crisper.js
diff --git a/chrome/browser/resources/md_downloads/crisper.js b/chrome/browser/resources/md_downloads/crisper.js
index 9d05ffdd5ae91cee082c934bf619d13186c33f6b..64e60e7097bb737561dddfd9cda4fc037a6732e3 100644
--- a/chrome/browser/resources/md_downloads/crisper.js
+++ b/chrome/browser/resources/md_downloads/crisper.js
@@ -1365,26 +1365,44 @@ function queryRequiredElement(selectors, opt_context) {
     if (e.defaultPrevented)
       return;
 
+    var eventPath = e.path;
+    var anchor = null;
+    if (eventPath) {
+      for (var i = 0; i < eventPath.length; i++) {
+        var element = eventPath[i];
+        if (element.tagName === 'A' && element.href) {
+          anchor = element;
+          break;
+        }
+      }
+    }
+
+    // Fallback if Event.path is not available.
     var el = e.target;
-    if (el.nodeType == Node.ELEMENT_NODE &&
+    if (!anchor && el.nodeType == Node.ELEMENT_NODE &&
         el.webkitMatchesSelector('A, A *')) {
       while (el.tagName != 'A') {
         el = el.parentElement;
       }
+      anchor = el;
+    }
 
-      if ((el.protocol == 'file:' || el.protocol == 'about:') &&
-          (e.button == 0 || e.button == 1)) {
-        chrome.send('navigateToUrl', [
-          el.href,
-          el.target,
-          e.button,
-          e.altKey,
-          e.ctrlKey,
-          e.metaKey,
-          e.shiftKey
-        ]);
-        e.preventDefault();
-      }
+    if (!anchor)
+      return;
+
+    anchor = /** @type {!HTMLAnchorElement} */(anchor);
+    if ((anchor.protocol == 'file:' || anchor.protocol == 'about:') &&
+        (e.button == 0 || e.button == 1)) {
+      chrome.send('navigateToUrl', [
+        anchor.href,
+        anchor.target,
+        e.button,
+        e.altKey,
+        e.ctrlKey,
+        e.metaKey,
+        e.shiftKey
+      ]);
+      e.preventDefault();
     }
   });
 });
@@ -11919,4 +11937,4 @@ cr.define('downloads', function() {
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-window.addEventListener('load', downloads.Manager.onLoad);
+window.addEventListener('load', downloads.Manager.onLoad);