Move RenderLayer repainting to repaint-after-layout framework.

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index 027b65183becdaa9ea70f2b5bd905eb6935ee7ad..fb742a7bef4206fe7308435738e12ee691d83a20 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -1745,6 +1745,8 @@ void RenderBlock::layoutPositionedObjects(bool relayoutChildren, bool fixedPosit
     for (TrackedRendererListHashSet::iterator it = positionedDescendants->begin(); it != end; ++it) {
         r = *it;
 
+        LayoutRectRecorder recorder(*r);
+
         SubtreeLayoutScope layoutScope(r);
         // A fixed position element with an absolute positioned ancestor has no way of knowing if the latter has changed position. So
         // if this is a fixed position element, mark it for layout if it has an abspos ancestor and needs to move with that ancestor, i.e.