[Chromoting] Create core Application interface for CRD.

remoting/webapp/crd/js/client_session.js

Index: remoting/webapp/crd/js/client_session.js
diff --git a/remoting/webapp/crd/js/client_session.js b/remoting/webapp/crd/js/client_session.js
index 81a6ae100184910fee13f67c3442889cec799618..a9b93814fcd35eec4956548c2744cbdf9ecbfa96 100644
--- a/remoting/webapp/crd/js/client_session.js
+++ b/remoting/webapp/crd/js/client_session.js
@@ -626,6 +626,7 @@ remoting.ClientSession.prototype.disconnect = function(error) {
   this.logToServer.logClientSessionStateChange(state, error);
   this.error_ = error;
   this.setState_(state);
+  remoting.app.onDisconnected();
 };
 
 /**
@@ -1280,6 +1281,10 @@ remoting.ClientSession.prototype.updateDimensions = function() {
   var clientHeight = document.documentElement.clientHeight;
   var parentNode = this.plugin_.element().parentNode;
 
+  // When we receive the first plugin dimensions from the host, we know that
+  // remote host has started.

[Jamie, 2014/12/06 01:57:59]

s/remote host/the video stream/

Also, please move this to the end of the function; if nothing else, it removes
the gap between the previous three declarations and their use.

[garykac, 2014/12/06 02:15:50]

Done.

+  remoting.app.onVideoStreamingStarted();
+
   console.log('plugin dimensions: ' +
               parentNode.style.left + ',' +
               parentNode.style.top + '-' +