Move IdleTask to WebThread side 2/3

Move IdleTask to WebThread side 2/3

Second step of a a three sided patch to move IdleTask to WebThread.
This is needed because we plan to introduce a scheduler for worker
threads, and they will use the WebTherad interface for posting idle
tasks.

Other patches https://codereview.chromium.org/1031843002/
and https://codereview.chromium.org/1029803002

BUG=463143
Committed: https://crrev.com/2e2647b9a70d35ced01dbf3a35ea2647bebbf025
Cr-Commit-Position: refs/heads/master@{#322443}

[alex clarke (OOO till 29th), 2015-03-24 11:25:20]

alexclarke@chromium.org changed reviewers:
+ jamesr@chromium.org, rmcilroy@chromium.org

[rmcilroy, 2015-03-24 12:44:08]

Same typo in description.

Otherwise renderer/scheduler lgtm.

[alex clarke (OOO till 29th), 2015-03-25 14:25:59]

alexclarke@chromium.org changed reviewers:
+ ben@chromium.org

[jamesr, 2015-03-26 18:05:30]

mojo/ lgtm

https://codereview.chromium.org/1029343002/diff/1/mojo/services/html_viewer/w...
File mojo/services/html_viewer/webscheduler_impl.h (right):

https://codereview.chromium.org/1029343002/diff/1/mojo/services/html_viewer/w...
mojo/services/html_viewer/webscheduler_impl.h:23: blink::WebThread::IdleTask*
task);
this is misaligned - please run 'git cl format'

[alex clarke (OOO till 29th), 2015-03-26 18:11:36]

On 2015/03/26 18:05:30, jamesr wrote:
> mojo/ lgtm
> 
>
https://codereview.chromium.org/1029343002/diff/1/mojo/services/html_viewer/w...
> File mojo/services/html_viewer/webscheduler_impl.h (right):
> 
>
https://codereview.chromium.org/1029343002/diff/1/mojo/services/html_viewer/w...
> mojo/services/html_viewer/webscheduler_impl.h:23: blink::WebThread::IdleTask*
> task);
> this is misaligned - please run 'git cl format'

Done, thanks

[alex clarke (OOO till 29th), 2015-03-26 18:12:42]

The CQ bit was checked by alexclarke@chromium.org

[alex clarke (OOO till 29th), 2015-03-26 18:12:42]

The patchset sent to the CQ was uploaded after l-g-t-m from jamesr@chromium.org,
rmcilroy@chromium.org
Link to the patchset: https://codereview.chromium.org/1029343002/#ps20001
(title: "run git cl format")

[commit-bot: I haz the power, 2015-03-26 18:13:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1029343002/20001

[commit-bot: I haz the power, 2015-03-26 19:22:40]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-26 19:23:37]

Patchset 2 (id:??) landed as
https://crrev.com/2e2647b9a70d35ced01dbf3a35ea2647bebbf025
Cr-Commit-Position: refs/heads/master@{#322443}