Allow ability to handle cursor position changes on gpu IO thread

GPU main could be very janky depending on what is being rendered, whenever possible, we need to handle cursor moves on GPU IO thread.

BUG=

Committed: https://crrev.com/2e8ed92e162ff1684b4f97fc7a9bbdaa2d78451b
Cr-Commit-Position: refs/heads/master@{#310614}

[alexst (slow to review), 2015-01-08 02:00:42]

alexst@chromium.org changed reviewers:
+ dnicoara@chromium.org, spang@chromium.org

[alexst (slow to review), 2015-01-08 02:01:32]

Please have a look, guys.

[spang, 2015-01-08 18:58:30]

lgtm

https://codereview.chromium.org/795933008/diff/100001/ui/ozone/platform/dri/d...
File ui/ozone/platform/dri/dri_gpu_platform_support.cc (right):

https://codereview.chromium.org/795933008/diff/100001/ui/ozone/platform/dri/d...
ui/ozone/platform/dri/dri_gpu_platform_support.cc:32: io_thread_task_runner_ =
base::MessageLoop::current()->task_runner();
I think the preferred spelling of this is:

  base::ThreadTaskRunnerHandle::Get().

[spang, 2015-01-08 18:58:57]

On 2015/01/08 18:58:30, spang wrote:
> lgtm
> 
>
https://codereview.chromium.org/795933008/diff/100001/ui/ozone/platform/dri/d...
> File ui/ozone/platform/dri/dri_gpu_platform_support.cc (right):
> 
>
https://codereview.chromium.org/795933008/diff/100001/ui/ozone/platform/dri/d...
> ui/ozone/platform/dri/dri_gpu_platform_support.cc:32: io_thread_task_runner_ =
> base::MessageLoop::current()->task_runner();
> I think the preferred spelling of this is:
> 
>   base::ThreadTaskRunnerHandle::Get().

We are definitely all going to hell.

[alexst (slow to review), 2015-01-08 19:46:43]

PTAL

[alexst (slow to review), 2015-01-08 19:59:34]

Patchset #1 (id:1) has been deleted

[spang, 2015-01-08 20:01:01]

lgtm

[alexst (slow to review), 2015-01-08 21:42:21]

The CQ bit was checked by alexst@chromium.org

[commit-bot: I haz the power, 2015-01-08 21:43:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/795933008/120001

[commit-bot: I haz the power, 2015-01-08 22:30:00]

Committed patchset #6 (id:120001)

[commit-bot: I haz the power, 2015-01-08 22:30:50]

Patchset 6 (id:??) landed as
https://crrev.com/2e8ed92e162ff1684b4f97fc7a9bbdaa2d78451b
Cr-Commit-Position: refs/heads/master@{#310614}