gpu: Remove flush of command buffer before creating a new image.

gpu: Remove flush of command buffer before creating a new image.

This is unnecessary as image ids are not reused. CreateImage will
fail if generation of image ids wraparound as negative ids are
considered an error.

R=piman@chromium.org
BUG=

Committed: https://crrev.com/93b8beea2b4716d2484f3499a6370c92d3e39b30
Cr-Commit-Position: refs/heads/master@{#302385}

[piman, 2014-11-01 00:00:13]

lgtm

[reveman, 2014-11-01 12:27:27]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2014-11-01 12:28:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/689253002/1

[commit-bot: I haz the power, 2014-11-01 13:09:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-01 13:10:18]

Patchset 1 (id:??) landed as
https://crrev.com/93b8beea2b4716d2484f3499a6370c92d3e39b30
Cr-Commit-Position: refs/heads/master@{#302385}