Add gpu_unittests to chromium_gpu_builder.

Add gpu_unittests to chromium_gpu_builder.

This should be consistent with the other targets in the builder.

BUG=391895
Committed: https://crrev.com/a7baf43f46e5367dc8f32db7f2eb8a201f4e746b
Cr-Commit-Position: refs/heads/master@{#295745}

[Jamie Madill, 2014-09-19 16:51:38]

jmadill@chromium.org changed reviewers:
+ kbr@chromium.org, zmo@chromium.org

[Jamie Madill, 2014-09-19 16:51:44]

PTAL

[Zhenyao Mo, 2014-09-19 17:36:24]

On 2014/09/19 16:51:44, Jamie Madill wrote:
> PTAL

LGTM

[Jamie Madill, 2014-09-19 17:36:54]

The CQ bit was checked by jmadill@chromium.org

[commit-bot: I haz the power, 2014-09-19 17:37:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/584953002/1

[Ken Russell (switch to Gerrit), 2014-09-19 17:54:39]

Going forward let's move the build targets into the GPU recipe and remove the
chromium_gpu_debug_builder target. The recipe knows whether it's building Debug
or Release and can choose the targets differently as necessary. It simplifies
maintenance if building a new target only involves adding it to the recipe and
not also modifying this build target. (Also, building the isolate, which the
recipe already does, implicitly builds this target, so I think this addition
isn't strictly necessary.)

[commit-bot: I haz the power, 2014-09-19 18:34:48]

Committed patchset #1 (id:1) as 8a6e8fac2b2df7c0e0bed3a265dcffd3d35f9128

[commit-bot: I haz the power, 2014-09-19 18:35:30]

Patchset 1 (id:??) landed as
https://crrev.com/a7baf43f46e5367dc8f32db7f2eb8a201f4e746b
Cr-Commit-Position: refs/heads/master@{#295745}