Implement CSSOM Smooth Scroll API

public/platform/WebCompositorSupport.h

 /*
  * Copyright (C) 2012 Google 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 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 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.
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 #ifndef WebCompositorSupport_h
 #define WebCompositorSupport_h
 
 #include "WebAnimation.h"
+#include "WebAnimationCurve.h"
 #include "WebCommon.h"
+#include "WebFloatPoint.h"
 #include "WebLayerTreeView.h"
 #include "WebScrollbar.h"
 #include "WebScrollbarThemePainter.h"
 
 namespace blink {
 
 class WebAnimationCurve;
 class WebCompositorOutputSurface;
 class WebContentLayer;
 class WebContentLayerClient;
 class WebExternalTextureLayer;
 class WebExternalTextureLayerClient;
 class WebFilterAnimationCurve;
 class WebFilterOperations;
 class WebFloatAnimationCurve;
 class WebGraphicsContext3D;
 class WebImageLayer;
 class WebNinePatchLayer;
 class WebLayer;
 class WebScrollbarLayer;
 class WebScrollbarThemeGeometry;
+class WebScrollOffsetAnimationCurve;
 class WebSolidColorLayer;
 class WebThread;
 class WebTransformAnimationCurve;
 class WebTransformOperations;
 
 class WebCompositorSupport {
 public:
     // Creates an output surface for the compositor backed by a 3d context.
     virtual WebCompositorOutputSurface* createOutputSurfaceFor3D(blink::WebGraphicsContext3D*) { return 0; }
 
@@ skipping 20 matching lines @@
     virtual WebScrollbarLayer* createSolidColorScrollbarLayer(WebScrollbar::Orientation, int thumbThickness, bool isLeftSideVerticalScrollbar) { return 0; }
 
     // Animation ----------------------------------------------------
 
     virtual WebAnimation* createAnimation(const WebAnimationCurve&, WebAnimation::TargetProperty, int animationId = 0) { return 0; }
 
     virtual WebFilterAnimationCurve* createFilterAnimationCurve() { return 0; }
 
     virtual WebFloatAnimationCurve* createFloatAnimationCurve() { return 0; }
 
+    virtual WebScrollOffsetAnimationCurve* createScrollOffsetAnimationCurve(WebFloatPoint targetValue, WebAnimationCurve::TimingFunctionType) { return 0; }
+
     virtual WebTransformAnimationCurve* createTransformAnimationCurve() { return 0; }
 
     virtual WebTransformOperations* createTransformOperations() { return 0; }
 
     virtual WebFilterOperations* createFilterOperations() { return 0; }
 
 protected:
     virtual ~WebCompositorSupport() { }
 };
 
 }
 
 #endif // WebCompositorSupport_h