Delete the old hotwording integration.

chrome/browser/resources/app_list/plugin_manager.js

-// Copyright 2013 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.
-
-/**
- * @fileoverview The manager of offline hotword speech recognizer plugin.
- */
-
-cr.define('speech', function() {
-  'use strict';
-
-  /** The timeout milliseconds to load the model file. */
-  var MODEL_LOAD_TIMEOUT = 2000;
-
-  /**
-   * The type of the plugin state.
-   ** @enum {number}
-   */
-  var PluginState = {
-    UNINITIALIZED: 0,
-    LOADED: 1,
-    READY: 2,
-    RECOGNIZING: 3
-  };
-
-  /**
-   * The command names of the plugin.
-   * @enum {string}
-   */
-  var pluginCommands = {
-    SET_SAMPLING_RATE: 'h',
-    SET_CONFIG: 'm',
-    START_RECOGNIZING: 'r',
-    STOP_RECOGNIZING: 's'
-  };
-
-  /**
-   * The regexp pattern of the hotword recognition result.
-   */
-  var recognitionPattern = /^(HotwordFiredEvent:|hotword)/;
-
-  /**
-   * @constructor
-   */
-  function PluginManager(prefix, onReady, onRecognized, onError) {
-    this.state = PluginState.UNINITIALIZED;
-    this.onReady_ = onReady;
-    this.onRecognized_ = onRecognized;
-    this.onError_ = onError;
-    this.samplingRate_ = null;
-    this.config_ = null;
-    this.modelLoadTimeoutId_ = null;
-    var recognizer = $('recognizer');
-    if (!recognizer) {
-      recognizer = document.createElement('EMBED');
-      recognizer.id = 'recognizer';
-      recognizer.type = 'application/x-nacl';
-      recognizer.src = 'chrome://app-list/hotword_' + prefix + '.nmf';
-      recognizer.width = '1';
-      recognizer.height = '1';
-      document.body.appendChild(recognizer);
-    }
-    recognizer.addEventListener('error', onError);
-    recognizer.addEventListener('message', this.onMessage_.bind(this));
-    recognizer.addEventListener('load', this.onLoad_.bind(this));
-  };
-
-  /**
-   * The event handler of the plugin status.
-   *
-   * @param {Event} messageEvent the event object from the plugin.
-   * @private
-   */
-  PluginManager.prototype.onMessage_ = function(messageEvent) {
-    if (messageEvent.data == 'audio') {
-      var wasNotReady = this.state < PluginState.READY;
-      this.state = PluginState.RECOGNIZING;
-      if (wasNotReady) {
-        window.clearTimeout(this.modelLoadTimeoutId_);
-        this.modelLoadTimeoutId_ = null;
-        this.onReady_(this);
-      }
-    } else if (messageEvent.data == 'stopped' &&
-               this.state == PluginState.RECOGNIZING) {
-      this.state = PluginState.READY;
-    } else if (recognitionPattern.exec(messageEvent.data)) {
-      this.onRecognized_();
-    }
-  };
-
-  /**
-   * The event handler when the plugin is loaded.
-   *
-   * @private
-   */
-  PluginManager.prototype.onLoad_ = function() {
-    if (this.state == PluginState.UNINITIALIZED) {
-      this.state = PluginState.LOADED;
-      if (this.samplingRate_ && this.config_)
-        this.initialize_(this.samplingRate_, this.config_);
-      // Sets the timeout for initialization in case that NaCl module failed to
-      // respond during the initialization.
-      this.modelLoadTimeoutId_ = window.setTimeout(
-          this.onError_, MODEL_LOAD_TIMEOUT);
-    }
-  };
-
-  /**
-   * Sends the initialization messages to the plugin. This method is private.
-   * The initialization will happen from onLoad_ or scheduleInitialize.
-   *
-   * @param {number} samplingRate the sampling rate the plugin accepts.
-   * @param {string} config the url of the config file.
-   * @private
-   */
-  PluginManager.prototype.initialize_ = function(samplingRate, config) {
-    $('recognizer').postMessage(
-        pluginCommands.SET_SAMPLING_RATE + samplingRate);
-    $('recognizer').postMessage(pluginCommands.SET_CONFIG + config);
-  };
-
-  /**
-   * Initializes the plugin with the specified parameter, or schedules the
-   * initialization if the plugin is not ready.
-   *
-   * @param {number} samplingRate the sampling rate the plugin accepts.
-   * @param {string} config the url of the config file.
-   */
-  PluginManager.prototype.scheduleInitialize = function(samplingRate, config) {
-    if (this.state == PluginState.UNINITIALIZED) {
-      this.samplingRate_ = samplingRate;
-      this.config_ = config;
-    } else {
-      this.initialize_(samplingRate, config);
-    }
-  };
-
-  /**
-   * Asks the plugin to start recognizing the hotword.
-   */
-  PluginManager.prototype.startRecognizer = function() {
-    if (this.state == PluginState.READY)
-      $('recognizer').postMessage(pluginCommands.START_RECOGNIZING);
-  };
-
-  /**
-   * Asks the plugin to stop recognizing the hotword.
-   */
-  PluginManager.prototype.stopRecognizer = function() {
-    if (this.state == PluginState.RECOGNIZING)
-      $('recognizer').postMessage(pluginCommands.STOP_RECOGNIZING);
-  };
-
-  /**
-   * Sends the actual audio wave data.
-   *
-   * @param {cr.event.Event} event The event for the audio data.
-   */
-  PluginManager.prototype.sendAudioData = function(event) {
-    if (this.state == PluginState.RECOGNIZING)
-      $('recognizer').postMessage(event.data.buffer);
-  };
-
-  return {
-    PluginManager: PluginManager,
-    PluginState: PluginState,
-  };
-});