Send message from popup to content script?

Send message from popup to content script?

References

Reference NO 1

http://stackoverflow.com/questions/6108906/chrome-extension-message-passing-from-popup-to-content-script

Reference NO 2

http://stackoverflow.com/questions/17103903/howto-send-a-message-from-content-script-to-inactive-popup-chrome-extension

Reference NO 3

https://groups.google.com/a/chromium.org/d/topic/chromium-extensions/bgeEbB6n0cQ

Reference NO 4

http://developer.chrome.com/extensions/samples.html

Reference NO 5

http://www.jefvlamings.com/blog/chrome-extensions-for-dummies/

Reference NO 6

http://stackoverflow.com/questions/17103903/howto-send-a-message-from-content-script-to-inactive-popup-chrome-extension

Reference NO 7

http://samdutton.wordpress.com/2010/12/16/debugging-google-chrome-extensions/

Reference NO 8

https://coderwall.com/p/hkmedw