gpu: Change qualcomm work-around.

gpu: Change qualcomm work-around.

The only way to keep image_preserved disabled was to use a
glFinish after EGL image creation. This is fine if we only
create EGL images on the upload thread, but we might start
doing this on either thread.

This alternative work around just doesn't use image-
preserve. The performance benefit wasn't large on Qualcomm
anyway.

No-try for Android only change.

NOTRY=true
BUG=175272
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=181819

[epenner, 2013-02-09 03:23:31]

Ptal

[epenner, 2013-02-11 19:21:35]

Minor tweaks. Ptal.

[apatrick_chromium, 2013-02-11 19:48:35]

lgtm

[commit-bot: I haz the power, 2013-02-11 22:32:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/epenner@chromium.org/12218088/5001

[commit-bot: I haz the power, 2013-02-12 01:28:10]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[commit-bot: I haz the power, 2013-02-12 01:55:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/epenner@chromium.org/12218088/5001

[commit-bot: I haz the power, 2013-02-12 01:59:50]

Change committed as 181819