Move switch kUseGpuInTests from chrome to content

Move switch kUseGpuInTests from chrome to content

The switch kUseGpuInTests is used to inform tests that they are running on a GPU bot (instead of a bot which may not have a real GPU in it).

The existing GPU tests which use this flag are chrome tests, so this flag had been happy living in chrome. There exist some content GPU tests that don't use this flag, but the GPU memory manager test is the first content test which uses this flag (it renders some very complicated scenes to stress GPU memory, and we shouldn't count on being able to run all of them on software raster).

BUG=135525
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=175633

[ccameron, 2013-01-07 19:58:35]

This has been split off from the change in
https://codereview.chromium.org/11667030/

[nduca, 2013-01-07 22:19:30]

lgtm

[ccameron, 2013-01-07 23:24:27]

Thanks!

Adding piman to review content/ changes (removing joi -- that wasn't the most
specific reviewer I could add).

[piman, 2013-01-07 23:35:29]

lgtm

[ccameron, 2013-01-07 23:37:58]

Thanks!!

[commit-bot: I haz the power, 2013-01-07 23:46:45]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/11777019/1

[commit-bot: I haz the power, 2013-01-09 00:28:21]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/11777019/1