Refactor repainting logic to abstract away the specific repaint container.

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 e9235a75cf58b3dca8ec0ccb8e3338a7cdfa2cd8..31c264b3ff5e2ea293c29604afd0315263188a6d 100644
--- a/Source/core/rendering/RenderLayerModelObject.cpp
+++ b/Source/core/rendering/RenderLayerModelObject.cpp
@@ -99,14 +99,14 @@ void RenderLayerModelObject::styleWillChange(StyleDifference diff, const RenderS
         // Do a repaint with the old style first through RenderLayerRepainter.
         // RenderObject::styleWillChange takes care of repainting objects without RenderLayers.
         if (parent() && diff.needsRepaintLayer()) {
-            layer()->repainter().repaintIncludingNonCompositingDescendants(containerForRepaint());
+            layer()->repainter().repaintIncludingNonCompositingDescendants();
             if (oldStyle->hasClip() != newStyle.hasClip()
                 || oldStyle->clip() != newStyle.clip())
                 layer()->clipper().clearClipRectsIncludingDescendants();
         } else if (diff.needsFullLayout()) {
             if (hasLayer()) {
                 if (!layer()->hasCompositedLayerMapping() && oldStyle->position() != newStyle.position())
-                    layer()->repainter().repaintIncludingNonCompositingDescendants(containerForRepaint());
+                    layer()->repainter().repaintIncludingNonCompositingDescendants();
             } else if (newStyle.hasTransform() || newStyle.opacity() < 1 || newStyle.hasFilter()) {
                 // If we don't have a layer yet, but we are going to get one because of transform or opacity,
                 //  then we need to repaint the old position of the object.