Rename isTreatedAsOrStackingContext to isStacked

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 278 matching lines @@
                 frameView->addViewportConstrainedObject(this);
             else
                 frameView->removeViewportConstrainedObject(this);
         }
     }
 }
 
 void LayoutBoxModelObject::createLayer(PaintLayerType type)
 {
     // If the current paint invalidation container is not a stacking context and this object is
-    // a or treated as a stacking context, creating this layer may cause this object and its
+    // a stacked content, creating this layer may cause this object and its

[pdr., 2016/03/16 02:22:53]

Nit: "... and this object is stacked content, ..."

[Xianzhu, 2016/03/16 18:10:24]

Done.

     // descendants to change paint invalidation container. Therefore we must eagerly invalidate
     // them on the original paint invalidation container before creating the layer.
-    if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled() && isRooted() && styleRef().isTreatedAsOrStackingContext()) {
+    if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled() && isRooted() && PaintLayerStackingNode::shouldStackObject(*this)) {
         const LayoutBoxModelObject& currentPaintInvalidationContainer = containerForPaintInvalidation();
         if (!currentPaintInvalidationContainer.styleRef().isStackingContext())
             invalidatePaintIncludingNonSelfPaintingLayerDescendants(currentPaintInvalidationContainer);
     }
 
     ASSERT(!m_layer);
     m_layer = adoptPtr(new PaintLayer(this, type));
     setHasLayer(true);
     m_layer->insertOnlyThisLayer();
 }
@@ skipping 647 matching lines @@
     if (rootElementStyle->hasBackground())
         return false;
 
     if (node() != document().firstBodyElement())
         return false;
 
     return true;
 }
 
 } // namespace blink