WIP: backface visibility plumbing (not for review)

third_party/WebKit/Source/core/paint/ObjectPaintProperties.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ObjectPaintProperties_h
 #define ObjectPaintProperties_h
 
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
 #include "platform/graphics/paint/EffectPaintPropertyNode.h"
@@ skipping 46 matching lines @@
 
     // This is a complete set of property nodes that should be used as a starting point to paint
     // this layout object. It is needed becauase some property inherits from the containing block,
     // not painting parent, thus can't be derived in O(1) during paint walk.
     // Note: If this layout object has transform or stacking-context effects, those are already
     // baked into in the context here. However for properties that affects only children,
     // for example, perspective and overflow clip, those should be applied by the painter
     // at the right painting step.
     struct LocalBorderBoxProperties {
         LayoutPoint paintOffset;
+        // TODO(pdr): We should switch this to be just the paint property nodes (i.e.,
+        // 4 x RefPtr<PaintPropertyTreeNode>) because other PaintChunk-related data may
+        // be set at a different time than the paint property nodes.
         PaintChunkProperties properties;
     };
     LocalBorderBoxProperties* localBorderBoxProperties() const { return m_localBorderBoxProperties.get(); }
 
 private:
     ObjectPaintProperties(
         PassRefPtr<TransformPaintPropertyNode> paintOffsetTranslation,
         PassRefPtr<TransformPaintPropertyNode> transform,
         PassRefPtr<EffectPaintPropertyNode> effect,
         PassRefPtr<ClipPaintPropertyNode> overflowClip,
@@ skipping 14 matching lines @@
     RefPtr<ClipPaintPropertyNode> m_overflowClip;
     RefPtr<TransformPaintPropertyNode> m_perspective;
     RefPtr<TransformPaintPropertyNode> m_scrollTranslation;
 
     OwnPtr<LocalBorderBoxProperties> m_localBorderBoxProperties;
 };
 
 } // namespace blink
 
 #endif // ObjectPaintProperties_h