Make availability of hotword hardware known to hotword component extension.

chrome/browser/resources/hotword/state_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';
 
   /**
    * Trivial container class for session information.
    * @param {!hotword.constants.SessionSource} source Source of the hotword
@@ skipping 283 matching lines @@
      */
     startDetector_: function() {
       // Last attempt to start detector resulted in an error.
       if (this.state_ == State_.ERROR) {
         // TODO(amistry): Do some error rate tracking here and disable the
         // extension if we error too often.
       }
 
       if (!this.pluginManager_) {
         this.state_ = State_.STARTING;
-        this.pluginManager_ = new hotword.NaClManager(this.loggingEnabled_);
+        var isHotwordStream = this.isAlwaysOnEnabled() &&
+            this.hotwordStatus_.hotwordStreamAvailable;
+        this.pluginManager_ = new hotword.NaClManager(this.loggingEnabled_,
+                                                      isHotwordStream);
         this.pluginManager_.addEventListener(hotword.constants.Event.READY,
                                              this.onReady_.bind(this));
         this.pluginManager_.addEventListener(hotword.constants.Event.ERROR,
                                              this.onError_.bind(this));
         this.pluginManager_.addEventListener(hotword.constants.Event.TRIGGER,
                                              this.onTrigger_.bind(this));
         this.pluginManager_.addEventListener(hotword.constants.Event.TIMEOUT,
                                              this.onTimeout_.bind(this));
         this.pluginManager_.addEventListener(
             hotword.constants.Event.SPEAKER_MODEL_SAVED,
@@ skipping 284 matching lines @@
 
       if (oldLocked != this.isLocked_)
         this.updateStateFromStatus_();
     }
   };
 
   return {
     StateManager: StateManager
   };
 });