Delete PaintInvalidationState. It's unused.

sky/engine/core/rendering/PaintInvalidationState.h

Index: sky/engine/core/rendering/PaintInvalidationState.h
diff --git a/sky/engine/core/rendering/PaintInvalidationState.h b/sky/engine/core/rendering/PaintInvalidationState.h
deleted file mode 100644
index 727baf724bd9150aa474df0bd8417bb4c6674964..0000000000000000000000000000000000000000
--- a/sky/engine/core/rendering/PaintInvalidationState.h
+++ /dev/null
@@ -1,63 +0,0 @@
-// 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 SKY_ENGINE_CORE_RENDERING_PAINTINVALIDATIONSTATE_H_
-#define SKY_ENGINE_CORE_RENDERING_PAINTINVALIDATIONSTATE_H_
-
-#include "sky/engine/platform/geometry/LayoutRect.h"
-#include "sky/engine/wtf/Noncopyable.h"
-
-namespace blink {
-
-class RenderBox;
-class RenderInline;
-class RenderLayerModelObject;
-class RenderObject;
-class RenderView;
-
-class PaintInvalidationState {
-    WTF_MAKE_NONCOPYABLE(PaintInvalidationState);
-public:
-    PaintInvalidationState(const PaintInvalidationState& next, RenderLayerModelObject& renderer, const RenderLayerModelObject& paintInvalidationContainer);
-
-    explicit PaintInvalidationState(const RenderView&);
-
-    const LayoutRect& clipRect() const { return m_clipRect; }
-    const LayoutSize& paintOffset() const { return m_paintOffset; }
-
-    bool cachedOffsetsEnabled() const { return m_cachedOffsetsEnabled; }
-    bool isClipped() const { return m_clipped; }
-
-    bool forceCheckForPaintInvalidation() const { return m_forceCheckForPaintInvalidation; }
-    void setForceCheckForPaintInvalidation() { m_forceCheckForPaintInvalidation = true; }
-
-    const RenderLayerModelObject& paintInvalidationContainer() const { return m_paintInvalidationContainer; }
-    const RenderObject& renderer() const { return m_renderer; }
-
-    bool canMapToContainer(const RenderLayerModelObject* container) const
-    {
-        return m_cachedOffsetsEnabled && container == &m_paintInvalidationContainer;
-    }
-private:
-    void applyClipIfNeeded(const RenderObject&);
-
-    friend class ForceHorriblySlowRectMapping;
-
-    bool m_clipped;
-    mutable bool m_cachedOffsetsEnabled;
-    bool m_forceCheckForPaintInvalidation;
-
-    LayoutRect m_clipRect;
-
-    // x/y offset from paint invalidation container. Includes relative positioning and scroll offsets.
-    LayoutSize m_paintOffset;
-
-    const RenderLayerModelObject& m_paintInvalidationContainer;
-
-    const RenderObject& m_renderer;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_RENDERING_PAINTINVALIDATIONSTATE_H_