Add a Record button to the web-app if the host supports video recording.

remoting/webapp/window_frame.js

Index: remoting/webapp/window_frame.js
diff --git a/remoting/webapp/window_frame.js b/remoting/webapp/window_frame.js
index 6aa32b03e193309aa73136f8378132182db93cbe..22ec46f56bbff7f735ef23d368d51c30dfcc4532 100644
--- a/remoting/webapp/window_frame.js
+++ b/remoting/webapp/window_frame.js
@@ -47,7 +47,8 @@ remoting.WindowFrame = function(titleBar) {
       titleBar.querySelector('.menu-resize-to-client'),
       titleBar.querySelector('.menu-shrink-to-fit'),
       titleBar.querySelector('.menu-new-connection'),
-      null);
+      null,
+      titleBar.querySelector('.menu-start-stop-recording'));
 
   /**
    * @type {HTMLElement}