Makes BitmapUploader handle null GLES2Context

Makes BitmapUploader handle null GLES2Context

Tests can hit this if mus is shutting down. Makes code early out,
assuming mus is in the process of shutting down.

BUG=594600
TEST=none
R=penghuang@chromium.org

Committed: https://crrev.com/8de9670ba51e7495887e666bfefa3728c1a37933
Cr-Commit-Position: refs/heads/master@{#403007}

[Peng, 2016-06-29 23:15:51]

On 2016/06/29 23:08:56, sky wrote:

lgtm

[sky, 2016-06-29 23:20:59]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-06-29 23:22:04]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-30 00:11:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-30 00:14:00]

Description was changed from

==========
Makes BitmapUploader handle null GLES2Context

Tests can hit this if mus is shutting down. Makes code early out,
assuming mus is in the process of shutting down.

BUG=594600
TEST=none
R=penghuang@chromium.org
==========

to

==========
Makes BitmapUploader handle null GLES2Context

Tests can hit this if mus is shutting down. Makes code early out,
assuming mus is in the process of shutting down.

BUG=594600
TEST=none
R=penghuang@chromium.org

Committed: https://crrev.com/8de9670ba51e7495887e666bfefa3728c1a37933
Cr-Commit-Position: refs/heads/master@{#403007}
==========

[commit-bot: I haz the power, 2016-06-30 00:14:01]

Patchset 1 (id:??) landed as
https://crrev.com/8de9670ba51e7495887e666bfefa3728c1a37933
Cr-Commit-Position: refs/heads/master@{#403007}