Fix copyright line on hotword extension files.

chrome/browser/resources/hotword/state_manager.js

-// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// 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 to manage hotwording state. Starts/stops the hotword detector based
    * on user settings, session requests, and any other factors that play into
    * whether or not hotwording should be running.
@@ skipping 263 matching lines @@
       this.sessionSource_ = null;
       this.sessionStartedCb_ = null;
       this.updateStateFromStatus_();
     }
   };
 
   return {
     StateManager: StateManager
   };
 });