tree ac9fd3893af5eb8547619f3116139006c3758154
parent 172a62a224967beee9e35e02a5b2fb2705dd2cc0
author Mathias Agopian <mathias@google.com> 1334558099 -0700
committer Mathias Agopian <mathias@google.com> 1334571555 -0700

get rid off preserve backbuffer optimization in SF

this optimization didn't improve performance and in fact
seemed to hurt more than anything else. it also made
things a lot more complex as it introduced edges cases
when switching to/from h/w composer.

Change-Id: Iaafc235e175f5740cd98bff914d706e02ab88bb8