Merge pull request #8116 from Dhilan007/v3-labelfix

Cocos2d-x used a deprecated method to calculates the bounding rect of a string on iOS 7.
remove duplicated Win32InputBox.cpp/.h and add WebViewTest to win32
Merge pull request #8134 from andyque/removeDeplicatedFile

remove duplicated Win32InputBox.cpp/.h and add WebViewTest to win32