Move RenderLayer repainting to repaint-after-layout framework.

Source/core/rendering/RenderLayerModelObject.cpp

Index: Source/core/rendering/RenderLayerModelObject.cpp
diff --git a/Source/core/rendering/RenderLayerModelObject.cpp b/Source/core/rendering/RenderLayerModelObject.cpp
index 82b423b6d1e9e948e10fed043cf89f8d26c50929..88e69afbfcf7765ce0db49d5a1f06a8552de2683 100644
--- a/Source/core/rendering/RenderLayerModelObject.cpp
+++ b/Source/core/rendering/RenderLayerModelObject.cpp
@@ -148,7 +148,10 @@ void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderSt
                 setChildNeedsLayout();
             createLayer(type);
             if (parent() && !needsLayout() && containingBlock()) {
-                layer()->repainter().setRepaintStatus(NeedsFullRepaint);
+                if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
+                    layer()->renderer()->setShouldDoFullRepaintAfterLayout(true);

[Julien - ping for review, 2014/03/04 18:22:10]

This seems overly broad as we could get a layer without visual impact (e.g. an
overflow only layer or a forced one). We should have a FIXME about removing this
crazy hammer and doing the right invalidation at RenderStyle::diff time.

[dsinclair, 2014/03/04 19:21:52]

Add a FIXME and crbug.com/349061.

+                else
+                    layer()->repainter().setRepaintStatus(NeedsFullRepaint);
                 // There is only one layer to update, it is not worth using |cachedOffset| since
                 // we are not sure the value will be used.
                 layer()->updateLayerPositions(0);