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

chrome/browser/resources/downloads/downloads.js

 // Copyright (c) 2012 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.
 
 // TODO(jhawkins): Use hidden instead of showInline* and display:none.
 
 /**
  * The type of the download object. The definition is based on
  * chrome/browser/ui/webui/downloads_dom_handler.cc:CreateDownloadItemValue()
  * @typedef {{by_ext_id: (string|undefined),
@@ skipping 34 matching lines @@
  * @param {!Element} node The target element to show or hide.
  * @param {boolean} isShow Should the target element be visible.
  */
 function showInlineBlock(node, isShow) {
   node.style.display = isShow ? 'inline-block' : 'none';
 }
 
 /**
  * Creates a link with a specified onclick handler and content.
  * @param {function()} onclick The onclick handler.
- * @param {string} value The link text.
+ * @param {string=} opt_text The link text.
  * @return {!Element} The created link element.
  */
-function createLink(onclick, value) {
-  var link = document.createElement('a');
+function createLink(onclick, opt_text) {

[aboxhall, 2014/10/22 21:33:31]

Perhaps this should be renamed createActionLink, to avoid confusion?

[Dan Beam, 2014/10/23 03:05:44]

Done.

+  var link = document.createElement('a', 'action-link');
   link.onclick = onclick;
-  link.href = '#';
-  link.textContent = value;
-  link.oncontextmenu = function() { return false; };
+  if (opt_text) link.textContent = opt_text;
   return link;
 }
 
 /**
  * Creates a button with a specified onclick handler and content.
  * @param {function()} onclick The onclick handler.
  * @param {string} value The button text.
  * @return {Element} The created button.
  */
 function createButton(onclick, value) {
@@ skipping 249 matching lines @@
   }
 
   this.nodeImg_ = createElementWithClassName('img', 'icon');
   this.nodeImg_.alt = '';
   this.safe_.appendChild(this.nodeImg_);
 
   // FileLink is used for completed downloads, otherwise we show FileName.
   this.nodeTitleArea_ = createElementWithClassName('div', 'title-area');
   this.safe_.appendChild(this.nodeTitleArea_);
 
-  this.nodeFileLink_ = createLink(this.openFile_.bind(this), '');
+  this.nodeFileLink_ = createLink(this.openFile_.bind(this));
   this.nodeFileLink_.className = 'name';
   this.nodeFileLink_.style.display = 'none';
   this.nodeTitleArea_.appendChild(this.nodeFileLink_);
 
   this.nodeFileName_ = createElementWithClassName('span', 'name');
   this.nodeFileName_.style.display = 'none';
   this.nodeTitleArea_.appendChild(this.nodeFileName_);
 
   this.nodeStatus_ = createElementWithClassName('span', 'status');
   this.nodeTitleArea_.appendChild(this.nodeStatus_);
@@ skipping 545 matching lines @@
     clearAllHolder.classList.remove('disabled-link');
   } else {
     clearAllElement = document.createTextNode(
         loadTimeData.getString('clear_all'));
     clearAllHolder.classList.add('disabled-link');
   }
   if (!loadTimeData.getBoolean('show_delete_history'))
     clearAllHolder.hidden = true;
 
   clearAllHolder.appendChild(clearAllElement);
-  clearAllElement.oncontextmenu = function() { return false; };
 
-  // TODO(jhawkins): Use a link-button here.
-  var openDownloadsFolderLink = $('open-downloads-folder');
-  openDownloadsFolderLink.onclick = function() {
+  $('open-downloads-folder').onclick = function() {
     chrome.send('openDownloadsFolder');
   };
-  openDownloadsFolderLink.oncontextmenu = function() { return false; };
 
   $('term').onsearch = function(e) {
     setSearch($('term').value);
   };
 }
 
 function setSearch(searchText) {
   fifoResults.length = 0;
   downloads.setSearchText(searchText);
   searchText = searchText.toString().match(/(?:[^\s"]+|"[^"]*")+/g);
@@ skipping 65 matching lines @@
     if (Date.now() - start > 50) {
       clearTimeout(resultsTimeout);
       resultsTimeout = setTimeout(tryDownloadUpdatedPeriodically, 5);
       break;
     }
   }
 }
 
 // Add handlers to HTML elements.
 window.addEventListener('DOMContentLoaded', load);
-
-preventDefaultOnPoundLinkClicks();  // From util.js.