Revert "Delete paint invalidaiton code in RenderLayerModelObject::styleWillChange."

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 d7c2716406ef2f4289bb96af63460b70cc2f968e..3f5acdee95a0cb6c9cddfe002dfedd498196f7f1 100644
--- a/Source/core/rendering/RenderLayerModelObject.cpp
+++ b/Source/core/rendering/RenderLayerModelObject.cpp
@@ -101,6 +101,15 @@ void RenderLayerModelObject::styleWillChange(StyleDifference diff, const RenderS
             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();
+            } 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.
+                paintInvalidationForWholeRenderer();
+            }
         }
     }