Enable ASSERT in positionFromPaintInvalidationContainer

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1324 matching lines @@
                 box->addFocusRingRects(rects, flooredIntPoint(pos), paintContainer);
             }
         } else {
             current->addFocusRingRects(rects, additionalOffset, paintContainer);
         }
     }
 }
 
 LayoutPoint RenderObject::positionFromPaintInvalidationContainer(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
-    // FIXME: This assert should be re-enabled when we move paint invalidation to after compositing update. crbug.com/360286
-    // ASSERT(containerForPaintInvalidation() == paintInvalidationContainer);
+    ASSERT(containerForPaintInvalidation() == paintInvalidationContainer);
 
     if (paintInvalidationContainer == this)
         return LayoutPoint();
 
     return LayoutPoint(localToContainerPoint(LayoutPoint(), paintInvalidationContainer, 0, 0, paintInvalidationState));
 }
 
 IntRect RenderObject::absoluteBoundingBoxRect() const
 {
     Vector<FloatQuad> quads;
@@ skipping 2106 matching lines @@
 {
     if (object1) {
         const blink::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif