LayoutObject::invalidatePaintIfNeededForSynchronizedPainting() and plumbing

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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 37 matching lines @@
 class LayoutObject;
 
 struct PaintInfo {
     ALLOW_ONLY_INLINE_ALLOCATION();
     PaintInfo(GraphicsContext* newContext, const IntRect& newRect, PaintPhase newPhase, GlobalPaintFlags globalPaintFlags, PaintLayerFlags paintFlags,
         LayoutObject* newPaintingRoot = 0, const LayoutBoxModelObject* newPaintContainer = 0)
         : context(newContext)
         , rect(newRect)
         , phase(newPhase)
         , paintingRoot(newPaintingRoot)
+        , paintInvalidationState(nullptr)
         , m_paintContainer(newPaintContainer)
         , m_paintFlags(paintFlags)
         , m_globalPaintFlags(globalPaintFlags)
     {
     }
 
     void updatePaintingRootForChildren(const LayoutObject* layoutObject)
     {
         if (!paintingRoot)
             return;
@@ skipping 34 matching lines @@
     {
         if (rect != LayoutRect::infiniteIntRect())
             rect = localToParentTransform.inverse().mapRect(rect);
     }
 
     // FIXME: Introduce setters/getters at some point. Requires a lot of changes throughout layout/.
     GraphicsContext* context;
     IntRect rect; // dirty rect used for culling non-intersecting layoutObjects
     PaintPhase phase;
     LayoutObject* paintingRoot; // used to draw just one element and its visual kids
+    // TODO(wangxianzhu): Populate it.
+    PaintInvalidationState* paintInvalidationState;
 
 private:
     const LayoutBoxModelObject* m_paintContainer; // the box model object that originates the current painting
 
     const PaintLayerFlags m_paintFlags;
     const GlobalPaintFlags m_globalPaintFlags;
 };
 
 } // namespace blink
 
 #endif // PaintInfo_h