Fixed #2474: Dispatch event failure in chrome.
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop-0.3.2beta
Fixed #2474: Dispatch event failure in chrome.
Merge pull request #2510 from VisualSJ/develop-0.3.2beta

Fixed #2474: Dispatch event failure in chrome.