RAL: Eliminate n^2 walk to find repaint containers

Source/core/rendering/RenderView.h

Index: Source/core/rendering/RenderView.h
diff --git a/Source/core/rendering/RenderView.h b/Source/core/rendering/RenderView.h
index c6d129f5e229fa3838f77af5c4ed3d9690de1679..b0acf04d6798c2d638a535c6f20831a7ac50aba0 100644
--- a/Source/core/rendering/RenderView.h
+++ b/Source/core/rendering/RenderView.h
@@ -215,7 +215,7 @@ private:
     bool pushLayoutState(RenderBox& renderer, const LayoutSize& offset, LayoutUnit pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0)
     {
         // We push LayoutState even if layoutState is disabled because it stores layoutDelta too.
-        if ((!doingFullRepaint() || RuntimeEnabledFeatures::repaintAfterLayoutEnabled()) || m_layoutState->isPaginated() || renderer.hasColumns() || renderer.flowThreadContainingBlock()
+        if ((!doingFullRepaint() || (RuntimeEnabledFeatures::repaintAfterLayoutEnabled() && !m_layoutStateDisableCount)) || m_layoutState->isPaginated() || renderer.hasColumns() || renderer.flowThreadContainingBlock()

[Julien - ping for review, 2014/05/07 17:50:03]

Can we use layoutStateEnabled() instead of that as m_layoutState should not be
null there?

Also that means that the comment above is no longer valid.

[leviw_travelin_and_unemployed, 2014/05/07 17:58:48]

We can definitely use layoutStateEnabled(). Also good point re: the comment (at
least for RAL). 

             ) {
             pushLayoutStateForCurrentFlowThread(renderer);
             m_layoutState = new LayoutState(m_layoutState, renderer, offset, pageHeight, pageHeightChanged, colInfo);