gpu: Move image creation part of GpuMemoryBufferFactory interface to gpu namespace.

gpu: Move image creation part of GpuMemoryBufferFactory interface to gpu namespace.

This moves the image creation part of the GpuMemoryBufferFactory
interface to a new ImageFactory interface in the gpu namespace. This
is necessary for in-process command buffer to be able to create
images.

This also moves some utility functions from CommandBufferProxy to
this new ImageFactory interface so they can be reused by the
in-process command buffer code.

BUG=423533
Committed: https://crrev.com/eeba91b525f74890247a93fe022054f12aee18cc
Cr-Commit-Position: refs/heads/master@{#301732}

[reveman, 2014-10-17 19:52:02]

reveman@chromium.org changed reviewers:
+ sievers@chromium.org

[no sievers, 2014-10-17 20:20:10]

lgtm

[no sievers, 2014-10-17 20:40:37]

Did you forget to add image_factory.cc from
https://codereview.chromium.org/665463003 into this patchset?

[reveman, 2014-10-17 21:45:17]

On 2014/10/17 20:40:37, sievers wrote:
> Did you forget to add image_factory.cc from
> https://codereview.chromium.org/665463003 into this patchset?

Yes, fixed in latest patch.

[reveman, 2014-10-28 22:03:27]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2014-10-28 22:04:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/659883003/40001

[commit-bot: I haz the power, 2014-10-28 22:49:35]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2014-10-28 22:50:14]

Patchset 3 (id:??) landed as
https://crrev.com/eeba91b525f74890247a93fe022054f12aee18cc
Cr-Commit-Position: refs/heads/master@{#301732}