Defer updateCompositingRequirementsState until the compositing update

Defer updateCompositingRequirementsState until the compositing update

This CL removes some compositing chicken/egg work by deferring
updateCompositingRequirementsState until the compositing update. This CL is the
first step towards properly integrating this work with the rest of the
compositing update.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171398

[Ian Vollick, 2014-04-11 21:09:36]

lgtm w/ minor question.

https://codereview.chromium.org/235933002/diff/1/LayoutTests/compositing/over...
File LayoutTests/compositing/overflow/overflow-scroll.html (right):

https://codereview.chromium.org/235933002/diff/1/LayoutTests/compositing/over...
LayoutTests/compositing/overflow/overflow-scroll.html:39: setTimeout(function()
{
why the timeout? could you use internals.forceCompositingUpdate?

[abarth-chromium, 2014-04-11 21:54:11]

On 2014/04/11 21:09:36, Ian Vollick wrote:
> why the timeout? could you use internals.forceCompositingUpdate?

Yes, I could use internals.forceCompositingUpdate, but I thought it would be
better to avoid calling internals methods when they aren't needed.  I'm happy to
change it though.

[abarth-chromium, 2014-04-11 22:07:46]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-11 22:07:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/235933002/20001

[commit-bot: I haz the power, 2014-04-11 22:21:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-11 22:21:41]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_dbg

[abarth-chromium, 2014-04-11 23:05:08]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-11 23:05:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/235933002/20001

[commit-bot: I haz the power, 2014-04-11 23:20:36]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-11 23:20:36]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_dbg

[abarth-chromium, 2014-04-11 23:41:16]

Sadly, that ASSERT failure represents a real problem.  This CL will require more
study.

[abarth-chromium, 2014-04-12 18:55:58]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-12 18:56:05]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/235933002/40001

[commit-bot: I haz the power, 2014-04-12 20:40:59]

Change committed as 171398