Fold ScrollingCoordinatorChromium into ScrollingCoordinator and devirtualize

Source/WebCore/page/scrolling/ScrollingStateNode.h

Index: Source/WebCore/page/scrolling/ScrollingStateNode.h
diff --git a/Source/WebCore/page/scrolling/ScrollingStateNode.h b/Source/WebCore/page/scrolling/ScrollingStateNode.h
deleted file mode 100644
index 6f93e4b1da1b7b96da95a452ad0c5cf79fa3944b..0000000000000000000000000000000000000000
--- a/Source/WebCore/page/scrolling/ScrollingStateNode.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Copyright (C) 2012 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ScrollingStateNode_h
-#define ScrollingStateNode_h
-
-#if ENABLE(THREADED_SCROLLING)
-
-#include "PlatformLayer.h"
-#include "ScrollingCoordinator.h"
-#include <wtf/OwnPtr.h>
-#include <wtf/PassOwnPtr.h>
-#include <wtf/Vector.h>
-
-#if PLATFORM(MAC)
-#include <wtf/RetainPtr.h>
-#endif
-
-namespace WebCore {
-
-class GraphicsLayer;
-class ScrollingStateTree;
-class TextStream;
-
-class ScrollingStateNode {
-public:
-    ScrollingStateNode(ScrollingStateTree*, ScrollingNodeID);
-    virtual ~ScrollingStateNode();
-
-    virtual bool isScrollingNode() { return false; }
-    virtual bool isFixedNode() { return false; }
-    virtual bool isStickyNode() { return false; }
-
-    virtual PassOwnPtr<ScrollingStateNode> clone() = 0;
-    PassOwnPtr<ScrollingStateNode> cloneAndReset();
-    void cloneAndResetChildren(ScrollingStateNode*);
-
-    enum {
-        ScrollLayer = 0,
-        NumStateNodeBits = 1
-    };
-    typedef unsigned ChangedProperties;
-
-    bool hasChangedProperties() const { return m_changedProperties; }
-    bool hasChangedProperty(unsigned propertyBit) { return m_changedProperties & (1 << propertyBit); }
-    void resetChangedProperties() { m_changedProperties = 0; }
-    void setPropertyChanged(unsigned propertyBit) { m_changedProperties |= (1 << propertyBit); }
-
-    virtual void syncLayerPositionForViewportRect(const LayoutRect& /*viewportRect*/) { }
-
-    GraphicsLayer* graphicsLayer() { return m_graphicsLayer; }
-    PlatformLayer* platformScrollLayer() const;
-    void setScrollLayer(GraphicsLayer*);
-    void setScrollPlatformLayer(PlatformLayer*);
-
-    ScrollingStateTree* scrollingStateTree() const { return m_scrollingStateTree; }
-    void setScrollingStateTree(ScrollingStateTree* tree) { m_scrollingStateTree = tree; }
-
-    ScrollingNodeID scrollingNodeID() const { return m_nodeID; }
-
-    ScrollingStateNode* parent() const { return m_parent; }
-    void setParent(ScrollingStateNode* parent) { m_parent = parent; }
-
-    Vector<OwnPtr<ScrollingStateNode> >* children() const { return m_children.get(); }
-
-    void appendChild(PassOwnPtr<ScrollingStateNode>);
-    void removeChild(ScrollingStateNode*);
-
-    String scrollingStateTreeAsText() const;
-
-protected:
-    ScrollingStateNode(const ScrollingStateNode&);
-    static void writeIndent(TextStream&, int indent);
-
-    ScrollingStateTree* m_scrollingStateTree;
-
-private:
-    void dump(TextStream&, int indent) const;
-
-    virtual void dumpProperties(TextStream&, int indent) const = 0;
-    ChangedProperties changedProperties() const { return m_changedProperties; }
-
-    ScrollingNodeID m_nodeID;
-    ChangedProperties m_changedProperties;
-
-    ScrollingStateNode* m_parent;
-    OwnPtr<Vector<OwnPtr<ScrollingStateNode> > > m_children;
-
-#if PLATFORM(MAC)
-    RetainPtr<PlatformLayer> m_platformScrollLayer;
-#endif
-    GraphicsLayer* m_graphicsLayer;
-
-};
-
-} // namespace WebCore
-
-#endif // ENABLE(THREADED_SCROLLING)
-
-#endif // ScrollingStateNode_h