ui: Remove GLImageGLX.

ui: Remove GLImageGLX.

This code is not being shipped and there are no plans that will
change that. Remove it for now as it means less code to maintain
and will allow some cleanup. It can be added back later if needed.

BUG=
R=piman@chromium.org

Committed: https://crrev.com/fa4afa9c8737114462d305adfa1def3f000318dd
Cr-Commit-Position: refs/heads/master@{#302470}

[piman, 2014-11-03 19:12:17]

lgtm

[reveman, 2014-11-03 19:13:13]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2014-11-03 19:14:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/699643002/1

[reveman, 2014-11-03 19:17:48]

The CQ bit was unchecked by reveman@chromium.org

[reveman, 2014-11-03 19:18:31]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2014-11-03 19:19:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/699643002/1

[commit-bot: I haz the power, 2014-11-03 19:56:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-03 19:57:18]

Patchset 1 (id:??) landed as
https://crrev.com/fa4afa9c8737114462d305adfa1def3f000318dd
Cr-Commit-Position: refs/heads/master@{#302470}