Fix paint invalidation of paintInvalidationContainer itself

third_party/WebKit/Source/core/layout/PaintInvalidationState.h

 // Copyright 2014 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 PaintInvalidationState_h
 #define PaintInvalidationState_h
 
 #include "platform/geometry/LayoutRect.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/Allocator.h"
@@ skipping 36 matching lines @@
     bool isClipped() const { return m_clipped; }
 
     bool forcedSubtreeInvalidationWithinContainer() const { return m_forcedSubtreeInvalidationWithinContainer; }
     void setForceSubtreeInvalidationWithinContainer() { m_forcedSubtreeInvalidationWithinContainer = true; }
 
     bool forcedSubtreeInvalidationRectUpdateWithinContainer() const { return m_forcedSubtreeInvalidationRectUpdateWithinContainer; }
     void setForceSubtreeInvalidationRectUpdateWithinContainer() { m_forcedSubtreeInvalidationRectUpdateWithinContainer = true; }
 
     const LayoutBoxModelObject& paintInvalidationContainer() const { return m_paintInvalidationContainer; }
 
-    bool canMapToContainer(const LayoutBoxModelObject* container) const
+    bool canMapToAncestor(const LayoutBoxModelObject* ancestor) const
     {
-        return m_cachedOffsetsEnabled && container == &m_paintInvalidationContainer;
+        return m_cachedOffsetsEnabled && ancestor == &m_paintInvalidationContainer;
     }
+    void mapObjectRectToAncestor(const LayoutObject&, const LayoutBoxModelObject* ancestor, LayoutRect&) const;
 
     // Records |obj| as needing paint invalidation on the next frame. See the definition of PaintInvalidationDelayedFull for more details.
     void pushDelayedPaintInvalidationTarget(LayoutObject& obj) { m_pendingDelayedPaintInvalidations.append(&obj); }
     Vector<LayoutObject*>& pendingDelayedPaintInvalidationTargets() { return m_pendingDelayedPaintInvalidations; }
 
     // Disable view clipping and scroll offset adjustment for paint invalidation of FrameView scrollbars.
     // TODO(wangxianzhu): Remove this when root-layer-scrolls launches.
     bool viewClippingAndScrollOffsetDisabled() const { return m_viewClippingAndScrollOffsetDisabled; }
     void setViewClippingAndScrollOffsetDisabled(bool b) { m_viewClippingAndScrollOffsetDisabled = b; }
 
@@ skipping 29 matching lines @@
     AffineTransform m_svgTransform;
 
     Vector<LayoutObject*>& m_pendingDelayedPaintInvalidations;
 
     PaintLayer& m_enclosingSelfPaintingLayer;
 };
 
 } // namespace blink
 
 #endif // PaintInvalidationState_h