cc: Remove UseSkiaGpuBackend from pixel tests.

cc: Remove UseSkiaGpuBackend and ExpandedViewport from pixel tests.

The UseSkiaGpuBackend is false always and not queried anywhere. I
left this behind when I removed the Ganesh-in-GLRenderer thing we
had before.

The ExpandedViewport is slightly more mysterious but also not queried
anywhere, so I guess leftover from refactorings.

R=enne, vmpstr

Committed: https://crrev.com/8f13743166dbcf1d5938fe438796a98d370f63a8
Cr-Commit-Position: refs/heads/master@{#314926}

[danakj, 2015-02-05 23:21:58]

Some more bonus removal

[enne (OOO), 2015-02-05 23:22:51]

The CQ bit was checked by enne@chromium.org

[enne (OOO), 2015-02-05 23:22:51]

lgtm

[danakj, 2015-02-05 23:22:56]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2015-02-05 23:23:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/883353009/20001

[commit-bot: I haz the power, 2015-02-06 00:44:54]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-06 00:45:46]

Patchset 2 (id:??) landed as
https://crrev.com/8f13743166dbcf1d5938fe438796a98d370f63a8
Cr-Commit-Position: refs/heads/master@{#314926}