Issue 3712 fixed.
Merge pull request #3948 from mohit-agarwal/issue3712

[chrome] box-shadow does not show above and below the arrow

Thanks @mohit-agarwal! I tested this on:

Desktop (Current versions only):
* Firefox OSX
* Chrome OSX
* Safari OSX
* Opera OSX
* IE11/Windows 8.1


Mobile:
* iOS7/iPad
* Chrome for Android tablet
* Firefox for Android tablet
Mobile:

fixes #3712