hasSelfPaintingLayerDescendant should clean m_hasSelfPaintingLayerDescendantDirty

hasSelfPaintingLayerDescendant should clean m_hasSelfPaintingLayerDescendantDirty

Previously, it was possible to read stale data from
hasSelfPaintingLayerDescendant. After this CL, we clean out the dirty bit
automatically when you read this state. In order to make this work, this CL
separates hasSelfPaintingLayerDescendant from updateDescendantDependentFlags.

R=esprehn@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180124

[esprehn, 2014-08-12 23:27:53]

lgtm + nits

https://codereview.chromium.org/468633002/diff/1/Source/core/rendering/Render...
File Source/core/rendering/RenderLayer.h (right):

https://codereview.chromium.org/468633002/diff/1/Source/core/rendering/Render...
Source/core/rendering/RenderLayer.h:117: // FIXME: May people call this function
while it has out-of-date information.
Many

https://codereview.chromium.org/468633002/diff/1/Source/core/rendering/Render...
Source/core/rendering/RenderLayer.h:544: void
updateHasSelfPaintingLayerDescendantDirty() const;
updateHasSelfPaintingLayerDescendant(), you're not just updating the bit...

[abarth-chromium, 2014-08-12 23:29:01]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-08-12 23:30:01]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/abarth@chromium.org/468633002/20001

[commit-bot: I haz the power, 2014-08-13 00:31:02]

Change committed as 180124