Resolving Polymer ReferenceError Platform is not defined

While coding for Polymer JavaScript library for web component you will face an exception  "ReferenceError Platform is not defined", though all the library are included properly.In this Demo, "We will see How it occurs and its solution".Below screen shot shows the chrome inspect of loaded HTML of a sample polymer code.You can mark the platform file is loaded in 2nd script.This causes the above mention Reference error in chrome browser while it will run properly in Firefox. Thus the incorre...