Adds a Training Manager to the hotword extension.

BUG=397019

Review URL: https://codereview.chromium.org/687323003

Cr-Commit-Position: refs/heads/master@{#302530}

chrome/browser/resources/component_extension_resources.grd

@@ -99,6 +99,7 @@
         <include name="IDR_HOTWORD_NACL_MANAGER_JS" file="hotword/nacl_manager.js" type="BINDATA" />
         <include name="IDR_HOTWORD_PAGE_AUDIO_MANAGER_JS" file="hotword/page_audio_manager.js" type="BINDATA" />
         <include name="IDR_HOTWORD_STATE_MANAGER_JS" file="hotword/state_manager.js" type="BINDATA" />
+        <include name="IDR_HOTWORD_TRAINING_MANAGER_JS" file="hotword/training_manager.js" type="BINDATA" />
       </if>
       <if expr="not is_android">
         <include name="IDR_FEEDBACK_DEFAULT_HTML" file="feedback/html/default.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />

chrome/browser/resources/hotword/base_session_manager.js

@@ -69,7 +69,7 @@ cr.define('hotword', function() {
           function() {
             chrome.hotwordPrivate.setHotwordSessionState(true, function() {});
           },
-          this.handleHotwordTrigger_.bind(this));
+          this.handleHotwordTrigger.bind(this));
     },
 
     /**
@@ -83,9 +83,9 @@ cr.define('hotword', function() {
 
     /**
      * Handles a hotword triggered event.
-     * @private
+     * @protected
      */
-    handleHotwordTrigger_: function() {
+    handleHotwordTrigger: function() {
       hotword.debug('Hotword triggered: ' + this.sessionSource_);
       chrome.hotwordPrivate.notifyHotwordRecognition('search', function() {});
     },

chrome/browser/resources/hotword/constants.js

@@ -121,7 +121,8 @@ var CommandFromPage = {
 var SessionSource = {
   LAUNCHER: 'launcher',
   NTP: 'ntp',
-  ALWAYS: 'always'
+  ALWAYS: 'always',
+  TRAINING: 'training'
 };
 
 /**

chrome/browser/resources/hotword/manager.js

@@ -22,6 +22,7 @@
   var pageAudioManager = new hotword.PageAudioManager(stateManager);
   var alwaysOnManager = new hotword.AlwaysOnManager(stateManager);
   var launcherManager = new hotword.LauncherManager(stateManager);
+  var trainingManager = new hotword.TrainingManager(stateManager);
 
   // Detect Chrome startup and make sure we get a chance to run.
   chrome.runtime.onStartup.addListener(function() {

chrome/browser/resources/hotword/manifest.json

@@ -20,6 +20,7 @@
       "always_on_manager.js",
       "launcher_manager.js",
       "page_audio_manager.js",
+      "training_manager.js",
       "manager.js"
     ],
     "persistent": false

chrome/browser/resources/hotword/state_manager.js

@@ -159,6 +159,14 @@ cr.define('hotword', function() {
       return this.hotwordStatus_.alwaysOnEnabled;
     },
 
+    /**
+     * @return {boolean} True if training is enabled.
+     */
+    isTrainingEnabled: function() {
+      assert(this.hotwordStatus_, 'No hotword status (isTrainingEnabled)');
+      return this.hotwordStatus_.trainingEnabled;
+    },
+
     /**
      * Callback for hotwordPrivate.getStatus() function.
      * @param {chrome.hotwordPrivate.StatusDetails} status Current hotword
@@ -181,7 +189,9 @@ cr.define('hotword', function() {
       if (!this.hotwordStatus_)
         return;
 
-      if (this.hotwordStatus_.enabled || this.hotwordStatus_.alwaysOnEnabled) {
+      if (this.hotwordStatus_.enabled ||
+          this.hotwordStatus_.alwaysOnEnabled ||
+          this.hotwordStatus_.trainingEnabled) {
         // Start the detector if there's a session, and shut it down if there
         // isn't.
         // NOTE(amistry): With always-on, we want a different behaviour with

chrome/browser/resources/hotword/training_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.
+
+cr.define('hotword', function() {
+  'use strict';
+
+  /**
+   * Class used to manage speaker training. Starts a hotwording session
+   * if training is on, and automatically restarts the detector when a
+   * a hotword is triggered.
+   * @param {!hotword.StateManager} stateManager
+   * @constructor
+   * @extends {hotword.BaseSessionManager}
+   */
+  function TrainingManager(stateManager) {
+    hotword.BaseSessionManager.call(this,
+                                    stateManager,
+                                    hotword.constants.SessionSource.TRAINING);
+  }
+
+  TrainingManager.prototype = {
+    __proto__: hotword.BaseSessionManager.prototype,
+
+    /** @override */
+     enabled: function() {
+       return this.stateManager.isTrainingEnabled();
+     },
+
+    /** @override */
+    updateListeners: function() {
+      hotword.BaseSessionManager.prototype.updateListeners.call(this);
+      if (this.enabled())
+        this.startSession_();
+    },
+
+    /** @override */
+    handleHotwordTrigger: function() {
+      if (this.enabled()) {
+        hotword.BaseSessionManager.prototype.handleHotwordTrigger.call(this);
+        this.startSession_();
+      }
+    }
+  };
+
+  return {
+    TrainingManager: TrainingManager
+  };
+});