Fold ScrollingCoordinatorChromium into ScrollingCoordinator and devirtualize

Source/WebCore/page/scrolling/mac/ScrollingTreeScrollingNodeMac.h

Index: Source/WebCore/page/scrolling/mac/ScrollingTreeScrollingNodeMac.h
diff --git a/Source/WebCore/page/scrolling/mac/ScrollingTreeScrollingNodeMac.h b/Source/WebCore/page/scrolling/mac/ScrollingTreeScrollingNodeMac.h
deleted file mode 100644
index 39fa9699509b348b375e9fff79461f76759b8bd2..0000000000000000000000000000000000000000
--- a/Source/WebCore/page/scrolling/mac/ScrollingTreeScrollingNodeMac.h
+++ /dev/null
@@ -1,93 +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 ScrollingTreeScrollingNodeMac_h
-#define ScrollingTreeScrollingNodeMac_h
-
-#if ENABLE(THREADED_SCROLLING)
-
-#include "ScrollElasticityController.h"
-#include "ScrollingTreeScrollingNode.h"
-#include <wtf/RetainPtr.h>
-
-OBJC_CLASS CALayer;
-
-namespace WebCore {
-
-class ScrollingTreeScrollingNodeMac : public ScrollingTreeScrollingNode, private ScrollElasticityControllerClient {
-public:
-    explicit ScrollingTreeScrollingNodeMac(ScrollingTree*, ScrollingNodeID);
-    virtual ~ScrollingTreeScrollingNodeMac();
-
-private:
-    // ScrollingTreeNode member functions.
-    virtual void updateBeforeChildren(ScrollingStateNode*) OVERRIDE;
-    virtual void updateAfterChildren(ScrollingStateNode*) OVERRIDE;
-    virtual void handleWheelEvent(const PlatformWheelEvent&) OVERRIDE;
-
-    // ScrollElasticityController member functions.
-    virtual bool allowsHorizontalStretching() OVERRIDE;
-    virtual bool allowsVerticalStretching() OVERRIDE;
-    virtual IntSize stretchAmount() OVERRIDE;
-    virtual bool pinnedInDirection(const FloatSize&) OVERRIDE;
-    virtual bool canScrollHorizontally() OVERRIDE;
-    virtual bool canScrollVertically() OVERRIDE;
-    virtual bool shouldRubberBandInDirection(ScrollDirection) OVERRIDE;
-    virtual IntPoint absoluteScrollPosition() OVERRIDE;
-    virtual void immediateScrollBy(const FloatSize&) OVERRIDE;
-    virtual void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&) OVERRIDE;
-    virtual void startSnapRubberbandTimer() OVERRIDE;
-    virtual void stopSnapRubberbandTimer() OVERRIDE;
-
-    IntPoint scrollPosition() const;
-    void setScrollPosition(const IntPoint&);
-    void setScrollPositionWithoutContentEdgeConstraints(const IntPoint&);
-
-    void setScrollLayerPosition(const IntPoint&);
-
-    IntPoint minimumScrollPosition() const;
-    IntPoint maximumScrollPosition() const;
-
-    void scrollBy(const IntSize&);
-    void scrollByWithoutContentEdgeConstraints(const IntSize&);
-
-    void updateMainFramePinState(const IntPoint& scrollPosition);
-
-    void logExposedUnfilledArea();
-
-    ScrollElasticityController m_scrollElasticityController;
-    RetainPtr<CFRunLoopTimerRef> m_snapRubberbandTimer;
-
-    RetainPtr<CALayer> m_scrollLayer;
-    RetainPtr<CALayer> m_counterScrollingLayer;
-    IntPoint m_probableMainThreadScrollPosition;
-    bool m_lastScrollHadUnfilledPixels;
-};
-
-} // namespace WebCore
-
-#endif // ENABLE(THREADED_SCROLLING)
-
-#endif // ScrollingTreeScrollingNodeMac_h