Google integrating Google+ into their services such as Gmail, Google search, are Google+ notifications and its icons in Gmail, Google search global nav bar more of a distraction for you? if you say “yes” then here is Chrome extension BlockPlus blocks all references to Google+ from global nav bar in Google Chrome.
In Gmail new status bar on top and notifications can become distracting for you so as the Google+ icon in Google global nav bar.
BlockPlus removes Circles, Profile link, links to Google+ in the global nav bar and notifier also. This extension blocks http requests whenever you click Global nav bar.