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

remoting/webapp/host_setup_dialog.js

Index: remoting/webapp/host_setup_dialog.js
diff --git a/remoting/webapp/host_setup_dialog.js b/remoting/webapp/host_setup_dialog.js
index eb52b7c14c06b775bc6bfc75e269e71698f56dbd..61e139f4b9ce7c63adca27023e0820df6644e6ab 100644
--- a/remoting/webapp/host_setup_dialog.js
+++ b/remoting/webapp/host_setup_dialog.js
@@ -27,7 +27,7 @@ remoting.HostSetupFlow.State = {
   // 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.
@@ -231,9 +231,8 @@ remoting.HostSetupDialog.prototype.showForStartWithToken_ =
       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);
 };
@@ -325,8 +324,7 @@ remoting.HostSetupDialog.prototype.updateState_ = function() {
     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_();
@@ -356,6 +354,42 @@ remoting.HostSetupDialog.prototype.updateState_ = function() {
   }
 };
 
+/*
+ * @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.
  */