[Webapp Refactor] Reparent the ConnectedView into the delegate.

remoting/webapp/crd/js/cast_extension_handler.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.
 
 /**
  * @fileoverview Description of this file.
  * Class handling interaction with the cast extension session of the Chromoting
  * host. It receives and sends extension messages from/to the host through
  * the client session. It uses the Google Cast Chrome Sender API library to
  * interact with nearby Cast receivers.
@@ skipping 23 matching lines @@
   /** @private {string} */
   this.kApplicationId_ = "8A1211E3";
 
   /** @private {Array<Object>} */
   this.messageQueue_ = [];
 
   /** @private {?function(string,string)} */
   this.sendMessageToHostCallback_ = null;
 };
 
-/** @return {string} */
-remoting.CastExtensionHandler.prototype.getType = function() {
-  return 'cast_message';
+/** @private {string} */
+remoting.CastExtensionHandler.EXTENSION_TYPE = 'cast_message';
+
+/** @return {Array<string>} */
+remoting.CastExtensionHandler.prototype.getExtensionTypes = function() {
+  return [remoting.CastExtensionHandler.EXTENSION_TYPE];
 };
 
 /**
  * The id of the script node.
  * @private {string}
  */
 remoting.CastExtensionHandler.prototype.SCRIPT_NODE_ID_ = 'cast-script-node';
 
 /**
  * Attempts to load the Google Cast Chrome Sender API libary.
  *
  * @param {function(string,string)} sendMessageToHost Callback to send a message
  *     to the host.
  */
-remoting.CastExtensionHandler.prototype.start = function(sendMessageToHost) {
+remoting.CastExtensionHandler.prototype.startExtension =
+    function(sendMessageToHost) {
   this.sendMessageToHostCallback_ = sendMessageToHost;
 
   var node = document.getElementById(this.SCRIPT_NODE_ID_);
   if (node) {
     console.error(
         'Multiple calls to CastExtensionHandler.start_ not expected.');
     return;
   }
 
   // Create a script node to load the Cast Sender API.
@@ skipping 11 matching lines @@
   };
   var onLoadError = function(event) {
     console.error("Failed to load Chrome Cast Sender API.");
   }
   node.addEventListener('load', onLoad, false);
   node.addEventListener('error', onLoadError, false);
 };
 
 /**
  * Process Cast Extension Messages from the Chromoting host.
- * @param {string} msgString The extension message's data.
+ *
+ * @param {string} type The message type.
+ * @param {Object} message The parsed extension message data.
+ * @return {boolean} True if the extension message was handled.
  */
-remoting.CastExtensionHandler.prototype.onMessage = function(msgString) {
-  var message = getJsonObjectFromString(msgString);
-
+remoting.CastExtensionHandler.prototype.onExtensionMessage =
+    function(type, message) {
   // Save messages to send after a session is established.
   this.messageQueue_.push(message);
   // Trigger the sending of pending messages, followed by the one just
   // received.
   if (this.session_) {
     this.sendPendingMessages_();
   }
+  return true;
 };
 
 /**
  * Send cast-extension messages through the host via the plugin.
  * @param {Object} data The JSON response to be sent to the host. The
  *     response object must contain the appropriate keys.
  * @private
  */
 remoting.CastExtensionHandler.prototype.sendMessageToHost_ = function(data) {
-  this.sendMessageToHostCallback_(this.getType(), JSON.stringify(data));
+  this.sendMessageToHostCallback_(remoting.CastExtensionHandler.EXTENSION_TYPE,
+                                  JSON.stringify(data));
 };
 
 /**
  * Send pending messages from the host to the receiver app.
  * @private
  */
 remoting.CastExtensionHandler.prototype.sendPendingMessages_ = function() {
   var len = this.messageQueue_.length;
   for(var i = 0; i<len; i++) {
     this.session_.sendMessage(this.kCastNamespace_,
@@ skipping 213 matching lines @@
 };
 
 /**
  * Listener invoked when we fail to stop the receiver application.
  *
  * @param {chrome.cast.Error} error The error code.
  */
 remoting.CastExtensionHandler.prototype.onStopAppError = function(error) {
   console.error('Error Stopping App: ', error);
 };