Remove scheduleLayerUpdate from RenderLayerCompositor.

Remove scheduleLayerUpdate from RenderLayerCompositor.

Now that frames always have a layer and get their self-painting
bit updated whenever m_compositing changes, we don't need to
do a layer update when they get composited. Instead we just
need to mark the frame in the owner page as needing a compositing
update.

This removes one of the needs for applyUpdateLayerCompositingStateChickenEggHacks.

BUG=379097
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175505

[ojan, 2014-05-30 00:00:11]

This depends on https://codereview.chromium.org/302083002/.

[ojan, 2014-05-30 00:01:32]

Hmmm...removing the disabler was premature. I'll upload a new patch that doesn't
do that.

[ojan, 2014-05-30 00:32:28]

Nope. It wasn't that. We're hitting the assert I added last week when I asserted
that we have no unresolved dirty bits at the end of the compositing update. Will
need to dig more. This isn't ready for review.

[ojan, 2014-06-03 03:07:01]

OK. I think the new patch I have up for review is correct. It was the setting on
the child frames during the compositing update step that caused the dirty bits
to be hit. We no longer need to setNeedsCompositingUpdate/scheduleLayerUpdate on
the child frames because we always give iframes RenderLayers now.

This code was added in
http://src.chromium.org/viewvc/blink?view=revision&revision=59338. dstockwell
tried to remove it, but it was reverted in
http://src.chromium.org/viewvc/blink?view=revision&revision=166930. I'm hoping
it will stick with this patch. Waiting on the linux_chromium_chromeos_dbg trybot
to come back to verify.

[ojan, 2014-06-03 03:07:56]

Oh. Ugh. The trybot won't work since this patch depends on
https://codereview.chromium.org/302083002/. Lets get
https://codereview.chromium.org/302083002/ landed first and then I can come back
to this.

[esprehn, 2014-06-03 20:20:53]

lgtm, this is amazing.

[ojan, 2014-06-04 03:57:26]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-06-04 03:57:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/302093002/50001

[commit-bot: I haz the power, 2014-06-04 05:00:45]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)
  linux_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/1...)
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/10195)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/10519)

[commit-bot: I haz the power, 2014-06-04 05:08:10]

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

[commit-bot: I haz the power, 2014-06-04 05:08:11]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/10210)

[ojan, 2014-06-04 17:10:34]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-06-04 17:11:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/302093002/70001

[ojan, 2014-06-04 17:47:07]

The CQ bit was unchecked by ojan@chromium.org

[ojan, 2014-06-04 17:47:12]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-06-04 17:47:19]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/302093002/70001

[commit-bot: I haz the power, 2014-06-04 18:41:29]

Change committed as 175505