Classic Dev Mode(GWT) Will not support in Latest Chrome Browser

As per the GWT Announcements (Release note 2.6),

•  GWT Development Mode will no longer be available for Chrome sometime in 2014, so we improved alternate ways of debugging. There are improvements to Super Dev Mode, asserts, console logging, and error messages.
• So Lunching the Application in Chrome Newer Version with Classic Dev Mode is Disabled, because they have disabled NPAPI Plug-in in Chrome Newer Version. Now it’s time to use Super Dev Mode.

SuperDev mode as default in GWT 2.7:

The Main feature in GWT 2.7 is SuperDev mode(SDM), with Dev mode now deprecated. You use the browser’s built in debugger and don’t need to use any browser plugins. With SDM, all of your debugging happens right inside your browser, making it easier to debug mixed Java/Javascript code. If you are familiar with Super Dev Mode in 2.6, you will also notice that you no longer need any bookmarklets to enable/recompile when using Super Dev Mode, the code is recompiled automatically when you reload the page.

Other Workaround to Launch the Apps in Chrome Newer Version With Classic Dev Mode is to Enable NPAPI Flag, Follow the Below Steps

 

1.Open New Tab and Enter chrome://flags/#enable-npapi

 

2.Enable this Enable NPAPI Mac, Windows

 

3.Then bottom of the page click "Relunch" button.

 

**NPAPI  is scheduled to be removed from Chrome(version 45) in September 2015 and this workaround will be supported up to chrome 44 version only.