[Webkit-unassigned] [Bug 164340] REGRESSION (r206247): Painting milestones can be delayed until the next layer flush

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164340

--- Comment #5 from mitz at webkit.org <mitz at webkit.org> ---
Actually, I am seeing this with the root layer, which doesn’t even rely on RenderLayerCompositor::didPaintBacking, because RenderLayerBacking::paintIntoLayer calls FrameView::didPaintContents() directly which calls firePaintRelatedMilestonesIfNeeded() without a timer delay.

I am trying to understand in what cases that is not followed by a flush, so that I cam make a reliable test case for the fix that moves firing the pending milestones into the commit handler.

I am also trying to understand what’s the right thing to do for OS X 10.10, which doesn’t use the commit handler code path.

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