Add <a is="action-link">, a web component extension of <a> for in-page actions.

chrome/browser/ui/webui/downloads_ui_browsertest.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 GEN_INCLUDE(['downloads_ui_browsertest_base.js']);
 GEN('#include "chrome/browser/ui/webui/downloads_ui_browsertest.h"');
 
 // Test UI when removing entries is allowed.
 TEST_F('BaseDownloadsWebUITest', 'DeleteAllowed', function() {
   this.testHelper(true, false);
   // TODO(pamg): Mock out the back-end calls, so we can also test removing a
   // single item.
   testDone();
 });
 
-// Test that clicking <a href=#> doesn't actually go to #.
-TEST_F('BaseDownloadsWebUITest', 'PoundLinkClicksDontChangeUrl', function() {
-  assertEquals(this.browsePreload, document.location.href);
-  document.querySelector('.clear-all-link').click();
-  assertEquals(this.browsePreload, document.location.href);
-  testDone();
-});
-
 /**
  * Fixture for Downloads WebUI testing when deletions are prohibited.
  * @extends {BaseDownloadsWebUITest}
  * @constructor
  */
 function DownloadsWebUIDeleteProhibitedTest() {}
 
 DownloadsWebUIDeleteProhibitedTest.prototype = {
   __proto__: BaseDownloadsWebUITest.prototype,
 
   /** @override */
   testGenPreamble: function() {
     GEN('  SetDeleteAllowed(false);');
   },
 };
 
 // Test UI when removing entries is prohibited.
 TEST_F('DownloadsWebUIDeleteProhibitedTest', 'DeleteProhibited', function() {
   this.testHelper(false, false);
   // TODO(pamg): Mock out the back-end calls, so we can also test removing a
   // single item.
   testDone();
 });