tree c0f8ef926b7cc0c74eedc14b1cbc0a919278e2d9
parent db41880dd3259646b9ea43be6d8a91d4adb40122
author ztenghui <ztenghui@google.com> 1414623869 -0700
committer ztenghui <ztenghui@google.com> 1415315386 -0800

A better looking and faster spot shadow.

1. This improve the looking, the star shape (spike) on long action bar is gone.
Shadow is more smooth now.

2. The performance is better, too. For averaging around rect, round rect and
circle, the spot shadow itself is 3 times faster. On N7 v1, it could be less than
0.1 ms.

b/14976551
b/16712006

Change-Id: I61ed546ee56e7c8dbe504dfcaef12d084904b4b8