Issue #4277 : Remove some `on` functions of cc.game.
Merge branch 'develop-3.0' of git://github.com/cocos2d/cocos2d-html5 into iss_4277_fix4release3.0
Issue #4277 : Fix a bug while compiling by Closure Compiler.
Merge pull request #1671 from SmallAiTT/iss_4277_fix4release3.0

Issue #4277 : Remove some `on` functions of cc.game.