MD Settings: Proof of concept, highlighting search matches across Shadow DOM boundaries.

chrome/browser/resources/settings/settings_ui/settings_ui.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview
  * 'settings-ui' implements the UI for the Settings page.
  *
  * Example:
  *
@@ skipping 36 matching lines @@
    */
   onPaperResponsiveChange_: function(e) {
     if (Polymer.dom(e).rootTarget == this.$.panel)
       this.classList.toggle('narrowing', e.detail.narrow);
   },
 
   /** @private */
   directionDelegateChanged_: function() {
     this.$.panel.rightDrawer = this.directionDelegate.isRtl();
   },
+
+  attached: function() {
+    this.$.searchInput.addEventListener('search', function(event) {
+      search(this.$.searchInput.value, this);
+    }.bind(this));
+  },
+
+  onCancelSearchTap_: function() {
+    this.$.searchInput.value = '';
+    search(this.$.searchInput.value, this);
+  },
 });