Well i have just tried the sample example of real time js Google drive api. As they said in their tutorial,the application's text areas will be synced even if they are opened in different browser windows. But here the application is not doing that. It only reflects changes to the text areas of same browser window.
Here is the link: Google Drive Realtime JS API
Is there anything that i miss? I am running my application in Koding.com's vm.