Download the host components when user tries to enable Me2Me host.

remoting/webapp/host_setup_dialog.js

 // Copyright (c) 2012 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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
  * @param {Array.<remoting.HostSetupFlow.State>} sequence Sequence of
  *     steps for the flow.
  * @constructor
  */
 remoting.HostSetupFlow = function(sequence) {
   this.sequence_ = sequence;
   this.currentStep_ = 0;
   this.state_ = sequence[0];
   this.pin = '';
   this.consent = false;
 };
 
 /** @enum {number} */
 remoting.HostSetupFlow.State = {
   NONE: 0,
 
   // Dialog states.
   ASK_PIN: 1,
 
-  // Used on Mac OS X to prompt the user to manually install a .dmg package.
+  // Prompts the user to install the host package.
   INSTALL_HOST: 2,
 
   // Processing states.
   STARTING_HOST: 3,
   UPDATING_PIN: 4,
   STOPPING_HOST: 5,
 
   // Done states.
   HOST_STARTED: 6,
   UPDATED_PIN: 7,
@@ skipping 183 matching lines @@
 
   var flow = [
       remoting.HostSetupFlow.State.ASK_PIN,
       remoting.HostSetupFlow.State.STARTING_HOST,
       remoting.HostSetupFlow.State.HOST_STARTED];
 
   var installed =
       state != remoting.HostController.State.NOT_INSTALLED &&
       state != remoting.HostController.State.INSTALLING;
 
-  if (navigator.platform.indexOf('Mac') != -1 && !installed) {
+  if (!installed)
     flow.unshift(remoting.HostSetupFlow.State.INSTALL_HOST);
-  }
 
   this.startNewFlow_(flow);
 };
 
 /**
  * Show the dialog in order to change the PIN associated with a running daemon.
  *
  * @return {void} Nothing.
  */
 remoting.HostSetupDialog.prototype.showForPin = function() {
@@ skipping 71 matching lines @@
     remoting.setMode(remoting.AppMode.HOST_SETUP_ERROR);
   }
 
   var state = this.flow_.getState();
   if (state == remoting.HostSetupFlow.State.NONE) {
     this.hide();
   } else if (state == remoting.HostSetupFlow.State.ASK_PIN) {
     remoting.setMode(remoting.AppMode.HOST_SETUP_ASK_PIN);
   } else if (state == remoting.HostSetupFlow.State.INSTALL_HOST) {
     remoting.setMode(remoting.AppMode.HOST_SETUP_INSTALL);
-    window.location =
-        'https://dl.google.com/chrome-remote-desktop/chromeremotedesktop.dmg';
+    this.installHost_();
   } else if (state == remoting.HostSetupFlow.State.STARTING_HOST) {
     showProcessingMessage(/*i18n-content*/'HOST_SETUP_STARTING');
     this.startHost_();
   } else if (state == remoting.HostSetupFlow.State.UPDATING_PIN) {
     showProcessingMessage(/*i18n-content*/'HOST_SETUP_UPDATING_PIN');
     this.updatePin_();
   } else if (state == remoting.HostSetupFlow.State.STOPPING_HOST) {
     showProcessingMessage(/*i18n-content*/'HOST_SETUP_STOPPING');
     this.stopHost_();
   } else if (state == remoting.HostSetupFlow.State.HOST_STARTED) {
     // TODO(jamiewalch): Only display the second string if the computer's power
     // management settings indicate that it's necessary.
     showDoneMessage(/*i18n-content*/'HOST_SETUP_STARTED',
                     /*i18n-content*/'HOST_SETUP_STARTED_DISABLE_SLEEP');
   } else if (state == remoting.HostSetupFlow.State.UPDATED_PIN) {
     showDoneMessage(/*i18n-content*/'HOST_SETUP_UPDATED_PIN');
   } else if (state == remoting.HostSetupFlow.State.HOST_STOPPED) {
     showDoneMessage(/*i18n-content*/'HOST_SETUP_STOPPED');
   } else if (state == remoting.HostSetupFlow.State.REGISTRATION_FAILED) {
     showErrorMessage(/*i18n-content*/'ERROR_HOST_REGISTRATION_FAILED');
   } else if (state == remoting.HostSetupFlow.State.START_HOST_FAILED) {
     showErrorMessage(/*i18n-content*/'HOST_SETUP_HOST_FAILED');
   } else if (state == remoting.HostSetupFlow.State.UPDATE_PIN_FAILED) {
     showErrorMessage(/*i18n-content*/'HOST_SETUP_UPDATE_PIN_FAILED');
   } else if (state == remoting.HostSetupFlow.State.STOP_HOST_FAILED) {
     showErrorMessage(/*i18n-content*/'HOST_SETUP_STOP_FAILED');
   }
 };
 
+/*
+ * @returns {string} URL of the host package for the current platform or an

[Jamie, 2014/01/31 18:39:15]

This function doesn't return anything.

[Sergey Ulanov, 2014/01/31 23:34:17]

Done.

+ * empty string if the platform is not supported
+ */
+remoting.HostSetupDialog.prototype.installHost_ = function() {
+  /** @type {remoting.HostSetupDialog} */
+  var that = this;
+  /** @type {remoting.HostSetupFlow} */
+  var flow = this.flow_;
+
+  var hostPackageUrl = '';
+  switch (navigator.platform) {
+    case 'Win32':
+      hostPackageUrl = 'http://dl.google.com/dl/edgedl/chrome-remote-desktop/chromeremotedesktophost.msi';
+      break;
+    case 'MacIntel':
+      hostPackageUrl = 'https://dl.google.com/chrome-remote-desktop/chromeremotedesktop.dmg';
+      break;
+    case 'Linux x86_64':
+      hostPackageUrl = 'https://dl.google.com/linux/direct/chrome-remote-desktop_current_amd64.deb';
+      break;
+    case 'Linux i386':
+      hostPackageUrl = 'https://dl.google.com/linux/direct/chrome-remote-desktop_current_i386.deb';
+      break;
+    default:
+      // We never expect to get in this state. Host controls should not be shown
+      // on unsupported platform.
+      flow.switchToErrorState(remoting.Error.UNEXPECTED);
+      that.updateState_();
+      return;
+  }
+
+  // Start downloading the package.
+  window.location = hostPackageUrl;

[Jamie, 2014/01/31 18:39:15]

This always assumes the Native Messaging case (ie, it will never attempt to
install using Omaha on Windows). That seems at odds with the HostDispatcher
class, which still supports both. It also doesn't appear to agree with the CL
description, which implies that the user should not be asked to install NM if
NPAPI is supported.

[Sergey Ulanov, 2014/01/31 23:34:17]

Good point. I've updated showForStartWithToken_() to skip the installation step
on windows when using the plugin.

+}
+
 /**
  * Registers and starts the host.
  */
 remoting.HostSetupDialog.prototype.startHost_ = function() {
   /** @type {remoting.HostSetupDialog} */
   var that = this;
   /** @type {remoting.HostSetupFlow} */
   var flow = this.flow_;
 
   /** @return {boolean} */
@@ skipping 195 matching lines @@
 
 /**
  * @return {void} Nothing.
  */
 remoting.HostSetupDialog.prototype.onInstallDialogRetry = function() {
   remoting.setMode(remoting.AppMode.HOST_SETUP_INSTALL);
 };
 
 /** @type {remoting.HostSetupDialog} */
 remoting.hostSetupDialog = null;