Support hotwording on google.com and the new tab page.

chrome/browser/resources/hotword/manager.js

 // Copyright 2014 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.
 
 (function() {
   'use strict';
 
   /**
    * @fileoverview This extension provides hotword triggering capabilites to
    * Chrome.
    *
    * This extension contains all the JavaScript for loading and managing the
    * hotword detector. The hotword detector and language model data will be
    * provided by a shared module loaded from the web store.
    *
    * IMPORTANT! Whenever adding new events, the extension version number MUST be
    * incremented.
    */
 
   // Hotwording state.
   var stateManager = new hotword.StateManager();
+  var pageAudioManager = new hotword.PageAudioManager(stateManager);
 
   // Detect Chrome startup and make sure we get a chance to run.
   chrome.runtime.onStartup.addListener(function() {
     stateManager.updateStatus();
   });
 
   // Detect when hotword settings have changed.
   chrome.hotwordPrivate.onEnabledChanged.addListener(function() {
     stateManager.updateStatus();
   });
 
   // Detect when the shared module containing the NaCL module and language model
   // is installed.
   chrome.management.onInstalled.addListener(function(info) {
     if (info.id == hotword.constants.SHARED_MODULE_ID)
-      chrome.runtime.reload();
+     chrome.runtime.reload();
   });
 
   // Detect when a session has requested to be started and stopped.
   chrome.hotwordPrivate.onHotwordSessionRequested.addListener(function() {
     // TODO(amistry): This event should change state depending on whether the
     // user has enabled always-on hotwording. But for now, always signal the
     // start of a hotwording session. This allows this extension to work with
     // the app launcher in the current state.
     stateManager.startSession(
         hotword.constants.SessionSource.LAUNCHER,
         function() {
           chrome.hotwordPrivate.setHotwordSessionState(true, function() {});
+        },
+        function() {
+          chrome.hotwordPrivate.notifyHotwordRecognition('search',

[rpetterson, 2014/09/25 02:23:37]

Based on hotword_private_api.cc, the type -- 'search' in this case -- parameter
isn't used. What will this eventually do?

[Anand Mistry (off Chromium), 2014/09/25 05:23:42]

Honestly, no idea. I have no plans for it. It already existed in the API.

[rpetterson, 2014/09/30 01:57:30]

I think Mukai originally wrote it . . . looking more at the code, it's not used
at all. I've added crbug.com/418847 to make sure we clean it up at some point.

+                                                         function() {});
         });
   });
 
   chrome.hotwordPrivate.onHotwordSessionStopped.addListener(function() {
     stateManager.stopSession(hotword.constants.SessionSource.LAUNCHER);
     chrome.hotwordPrivate.setHotwordSessionState(false, function() {});
   });
 }());