Remove some dead compositor-related webkit/support code

Remove some dead compositor-related webkit/support code

The code in webkit/support/ is only used by webkit_unit_tests, which
never needs to support accelerated 2d canvas or threaded compositing.
This removes some dead code related to those features formerly used by
DumpRenderTree.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=217024

[jamesr, 2013-08-09 02:04:25]

Hey Dana, want to review some removals?  I'm still pondering what exactly to do
about WebLayerTreeViewForTesting, which is used in a few unit tests.

[danakj, 2013-08-09 14:27:54]

Do I!  Mind uploading again? I'm getting error chunk mismatch.

[danakj, 2013-08-09 14:30:47]

Oh, the inline diffs work. LGTM.

https://codereview.chromium.org/22311010/diff/1/webkit/common/gpu/test_contex...
File webkit/common/gpu/test_context_provider_factory.h (left):

https://codereview.chromium.org/22311010/diff/1/webkit/common/gpu/test_contex...
webkit/common/gpu/test_context_provider_factory.h:24: 
Do you even need this for those unit tests? Can this whole class go away?

[jamesr, 2013-08-09 23:11:58]

On 2013/08/09 14:30:47, danakj wrote:
>
https://codereview.chromium.org/22311010/diff/1/webkit/common/gpu/test_contex...
> File webkit/common/gpu/test_context_provider_factory.h (left):
> 
>
https://codereview.chromium.org/22311010/diff/1/webkit/common/gpu/test_contex...
> webkit/common/gpu/test_context_provider_factory.h:24: 
> Do you even need this for those unit tests? Can this whole class go away?

This is still used by some unit tests that want to spin up a compositor
instance.  Still not entirely sure how to get rid of these but I'll keep poking
at it.

[commit-bot: I haz the power, 2013-08-09 23:14:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jamesr@chromium.org/22311010/1

[commit-bot: I haz the power, 2013-08-10 07:00:01]

Retried try job too often on win_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-08-12 16:33:53]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jamesr@chromium.org/22311010/1

[commit-bot: I haz the power, 2013-08-12 17:10:33]

Change committed as 217024