tree dd5022987010e7b50130c872bdcb8bf17f7c7799
parent 3142a81447381f3b25a108f3783d0e177f14ba54
author Bo Liu <boliu@google.com> 1395705388 -0700
committer Bo Liu <boliu@google.com> 1395705388 -0700

Cherry-pick: Do not clear root frame buffer for android webview

Cherry-pick of unlanded https://codereview.chromium.org/210443004/

Original description:

Android webview does not own the surface that compositor is drawing
into, and so should in general not it before draw.

BUG: 13134274
Change-Id: I90e8f39bd455f2494dbdcf48a40f15f837cf76fb