cocos2d/cocos2d-x — pull request #9060 by xavierarias (2014-11-07 11:11:37+00:00)
Title: Fixed retina/contentScale position errors for iPhone 6+ devices in EditBox

Problem is that factor was 1.0 or 2.0 until iOS 8 introduced 3.0.

I've replaced everything that depended on dividing by 2 for contentScaleFactor.