Delete PaintInvalidationState. It's unused.

sky/engine/core/rendering/RenderView.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef SKY_ENGINE_CORE_RENDERING_RENDERVIEW_H_
 #define SKY_ENGINE_CORE_RENDERING_RENDERVIEW_H_
 
 #include "sky/engine/core/frame/FrameView.h"
 #include "sky/engine/core/rendering/LayoutState.h"
-#include "sky/engine/core/rendering/PaintInvalidationState.h"
 #include "sky/engine/core/rendering/RenderBlockFlow.h"
 #include "sky/engine/core/rendering/RenderIFrame.h"
 #include "sky/engine/platform/scroll/ScrollableArea.h"
 #include "sky/engine/wtf/OwnPtr.h"
 
 namespace blink {
 
 // The root of the render tree, corresponding to the CSS initial containing block.
 // It's dimensions match that of the logical viewport (which may be different from
 // the visible viewport in fixed-layout mode), and it is always at position (0,0)
@@ skipping 69 matching lines @@
     double layoutViewportHeight() const;
 
     void pushLayoutState(LayoutState&);
     void popLayoutState();
 
     void addIFrame(RenderIFrame* iframe);
     void removeIFrame(RenderIFrame* iframe);
     void updateIFramesAfterLayout();
 
 private:
-    virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, const PaintInvalidationState* = 0) const override;
+    virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip) const override;
     virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const override;
     virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const override;
 
     bool shouldInvalidatePaint(const LayoutRect&) const;
 
     void layoutContent();
 #if ENABLE(ASSERT)
     void checkLayoutState();
 #endif
 
     void positionDialog(RenderBox*);
     void positionDialogs();
 
-    friend class ForceHorriblySlowRectMapping;
-
     RenderObject* backgroundRenderer() const;
 
     FrameView* m_frameView;
 
     RawPtr<RenderObject> m_selectionStart;
     RawPtr<RenderObject> m_selectionEnd;
 
     int m_selectionStartPos;
     int m_selectionEndPos;
 
     LayoutState* m_layoutState;
 
     unsigned m_renderCounterCount;
 
     unsigned m_hitTestCount;
 
     WTF::HashSet<RenderIFrame*> m_iframes;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderView, isRenderView());
 
-// Suspends the LayoutState cached offset and clipRect optimization. Used under transforms
-// that cannot be represented by LayoutState (common in SVG) and when manipulating the render
-// tree during layout in ways that can trigger paint invalidation of a non-child (e.g. when a list item
-// moves its list marker around). Note that even when disabled, LayoutState is still used to
-// store layoutDelta.
-class ForceHorriblySlowRectMapping {
-    WTF_MAKE_NONCOPYABLE(ForceHorriblySlowRectMapping);
-public:
-    ForceHorriblySlowRectMapping(const PaintInvalidationState* paintInvalidationState)
-        : m_paintInvalidationState(paintInvalidationState)
-        , m_didDisable(m_paintInvalidationState && m_paintInvalidationState->cachedOffsetsEnabled())
-    {
-        if (m_paintInvalidationState)
-            m_paintInvalidationState->m_cachedOffsetsEnabled = false;
-    }
-
-    ~ForceHorriblySlowRectMapping()
-    {
-        if (m_didDisable)
-            m_paintInvalidationState->m_cachedOffsetsEnabled = true;
-    }
-private:
-    const PaintInvalidationState* m_paintInvalidationState;
-    bool m_didDisable;
-};
-
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDERVIEW_H_