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

remoting/webapp/remoting.js

Index: remoting/webapp/remoting.js
diff --git a/remoting/webapp/remoting.js b/remoting/webapp/remoting.js
index b0519c21a7b7d9e31f52b8356c6b1c835698b055..2a3ea49077aba8adbfece087ef02923d38e50618 100644
--- a/remoting/webapp/remoting.js
+++ b/remoting/webapp/remoting.js
@@ -150,6 +150,26 @@ function isIT2MeSupported_() {
   return !remoting.runningOnChromeOS();
 }
 
+// TODO(sergeyu): We want to show Me2Me host controls only on some Linux
+// distributions that we know work properly with the chromoting host. Implement
+// dome detection mechanism and apply it here.
+/** @type {boolean} */
+remoting.supportedLinuxDistibutionDetected_ = false;
+
+/**
+ * @return {boolean}
+ */
+remoting.isMe2MeSupported = function isMe2MeSupported() {
+  /** @type {string} */
+  var platform = navigator.platform;
+
+  // Currently Me2Me is supported on Windows, OSX and some versions of Linux.
+  return platform == 'Win32' || platform == 'MacIntel' ||
+           ((platform == 'Linux x86_64' || platform == 'Linux i386') &&
+            remoting.supportedLinuxDistibutionDetected_ &&
+            !remoting.runningOnChromeOS());
+}
+
 /**
  * Display the user's email address and allow access to the rest of the app,
  * including parsing URL parameters.