Ensure that we trigger deferred frame commits.

Schedule a BeginFrame when we stop deferring commits.

We do not scheduleVisualUpdate for setNeedsStyleRecalc when we have
pending stylesheets. If we setNeedsStyleRecalc while loading a stylesheet,
we won't necessarily trigger a BeginFrame when the stylesheet finishes
loading because subsequent setNeedsStyleRecalc call won't trigger those
either if the ascendants are already marked with childNeedsStyleRecalc
because we assume the visual update is already scheduled.

Schedule a BeginFrame from resumeTreeViewCommits to make sure deferred
visual updates are triggered.

BUG=384934
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201933

[rune, 2015-08-31 22:44:06]

Ideas for how to make the test more reliable are welcome.

[esprehn, 2015-08-31 23:32:10]

Look at the new DocumentLoadingRenderingTest, you want to write one of those. I
don't think you want to look at repaints, just make sure a frame is scheduled?

I think we want the WebViewImpl to handle this, inside resumeTreeViewCommits we
should schedule a frame.

[rune, 2015-09-08 09:31:41]

On 2015/08/31 23:32:10, esprehn wrote:
> Look at the new DocumentLoadingRenderingTest, you want to write one of those.
I
> don't think you want to look at repaints, just make sure a frame is scheduled?
> 
> I think we want the WebViewImpl to handle this, inside resumeTreeViewCommits
we
> should schedule a frame.

Done.

[esprehn, 2015-09-08 20:37:52]

lgtm

[rune, 2015-09-08 20:44:32]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2015-09-08 20:44:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1316403004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1316403004/40001

[commit-bot: I haz the power, 2015-09-08 21:48:57]

Committed patchset #3 (id:40001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201933