Add messages on assertions.

chrome/browser/resources/hotword/nacl_manager.js

 // Copyright (c) 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 the state of the NaCl recognizer plugin. Handles all
  * control of the NaCl plugin, including creation, start, stop, trigger, and
@@ skipping 87 matching lines @@
   return this.recognizerState_ == ManagerState_.RUNNING;
 };
 
 /**
  * Set a timeout. Only allow one timeout to exist at any given time.
  * @param {!function()} func
  * @param {number} timeout
  * @private
  */
 NaClManager.prototype.setTimeout_ = function(func, timeout) {
-  assert(!this.naclTimeoutId_);
+  assert(!this.naclTimeoutId_, 'Timeout already exists');
   this.naclTimeoutId_ = window.setTimeout(
       function() {
         this.naclTimeoutId_ = null;
         func();
       }.bind(this), timeout);
 };
 
 /**
  * Clears the current timeout.
  * @private
@@ skipping 90 matching lines @@
   return plugin;
 };
 
 /**
  * Initializes the NaCl manager.
  * @param {!string} naclArch Either 'arm', 'x86-32' or 'x86-64'.
  * @param {!MediaStream} stream A stream containing an audio source track.
  * @return {boolean} True if the successful.
  */
 NaClManager.prototype.initialize = function(naclArch, stream) {
-  assert(this.recognizerState_ == ManagerState_.UNINITIALIZED);
+  assert(this.recognizerState_ == ManagerState_.UNINITIALIZED,
+         'Recognizer not in uninitialized state. State: ' +
+         this.recognizerState_);
   var langs = this.getPossibleLanguages_();
   var i, j;
   // For country-lang variations. For example, when combined with path it will
   // attempt to find: '/x86-32_en-gb/', else '/x86-32_en/', else '/x86-32_/'.
   for (i = 0; i < langs.length; i++) {
     var folder = hotword.constants.SHARED_MODULE_ROOT + '/_platform_specific/' +
         naclArch + '_' + langs[i] + '/';
     var dataSrc = folder + hotword.constants.File.RECOGNIZER_CONFIG;
     var pluginSrc = hotword.constants.SHARED_MODULE_ROOT + '/hotword_' +
         langs[i] + '.nmf';
@@ skipping 38 matching lines @@
   this.recognizerState_ = ManagerState_.SHUTDOWN;
   this.stream_ = null;
 };
 
 /**
  * Sends data to the NaCl plugin.
  * @param {!string} data Command to be sent to NaCl plugin.
  * @private
  */
 NaClManager.prototype.sendDataToPlugin_ = function(data) {
-  assert(this.recognizerState_ != ManagerState_.UNINITIALIZED);
+  assert(this.recognizerState_ != ManagerState_.UNINITIALIZED,
+         'Recognizer in uninitialized state');
   this.plugin_.postMessage(data);
 };
 
 /**
  * Waits, with a timeout, for a message to be received from the plugin. If the
  * message is not seen within the timeout, dispatch an 'error' event and go into
  * the ERROR state.
  * @param {number} timeout Timeout, in milliseconds, to wait for the message.
  * @param {!string} message Message to wait for.
  * @private
@@ skipping 137 matching lines @@
         break;
     }
   }
 };
 
 return {
   NaClManager: NaClManager
 };
 
 });