gpu: Enable async uploads again.

gpu: Enable async uploads again.

Random changes have been breaking Android bots. It turns
out async uploads isn't the issue, but rather simply that
old ICS Imagination drivers crash on glTexSubImage2D (very
consistantly).

This enables async uploads again, but also puts in a
work-around in our work-around :). When we fallback
to glTexSubImage2D, we use glTexImage2D instead.

BUG=174440
NOTRY=True

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=182299

[epenner, 2013-02-13 01:12:41]

Ptal.

[epenner, 2013-02-13 01:30:28]

On 2013/02/13 01:12:41, epenner wrote:
> Ptal.

+Daniel. I'd recommend all changes to this file be in the MP.

[epenner, 2013-02-13 01:31:05]

On 2013/02/13 01:30:28, epenner wrote:
> On 2013/02/13 01:12:41, epenner wrote:
> > Ptal.
> 
> +Daniel. I'd recommend all changes to this file be in the MP.

Darn: except for reveman's recent patch which we just reverted.

[apatrick_chromium, 2013-02-13 20:00:07]

lgtm

[commit-bot: I haz the power, 2013-02-13 20:08:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/epenner@chromium.org/12221161/4001

[nduca, 2013-02-13 20:38:15]

Committed manually as r182299.