Revert of Re-land: ui: Add GLImage unit test framework.

Revert of Re-land: ui: Add GLImage unit test framework. (patchset #18 id:340001 of https://codereview.chromium.org/1354483004/ )

Reason for revert:
libosmesa open failure has gone, but tests are still failing.

http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/32956
http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/32957
http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/32958

Original issue's description:
> Re-land: ui: Add GLImage unit test framework.
>
> This makes it possible to test GLImage implementations without
> requiring multi-process GpuMemoryBuffer support.
>
> This initial version is limited to testing CopyTexSubImage with
> the default buffer format but testing of more functionality and
> formats will be added in follow up patches.
>
> Also inlcudes some minor cleanup needed to not have GLImage
> implementations depend on GpuMemoryBuffer API.
>
> BUG=
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/11b3655a4dfd5b46f7783421e2959a41ddbf3a00
> Cr-Commit-Position: refs/heads/master@{#352767}

TBR=dcastagna@chromium.org,glider@chromium.org,piman@chromium.org,sky@chromium.org,reveman@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/de89c773fbb6bf9c8484fcb3f11256594417b5aa
Cr-Commit-Position: refs/heads/master@{#352779}

[Kunihiko Sakamoto, 2015-10-07 05:48:07]

Created Revert of Re-land: ui: Add GLImage unit test framework.

[commit-bot: I haz the power, 2015-10-07 05:49:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390143002/1

[commit-bot: I haz the power, 2015-10-07 05:52:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-07 05:52:56]

Patchset 1 (id:??) landed as
https://crrev.com/de89c773fbb6bf9c8484fcb3f11256594417b5aa
Cr-Commit-Position: refs/heads/master@{#352779}