Implement CSSOM Smooth Scroll API

public/platform/WebScrollOffsetAnimationCurve.h

Index: public/platform/WebScrollOffsetAnimationCurve.h
diff --git a/public/web/WebLeakDetector.h b/public/platform/WebScrollOffsetAnimationCurve.h
similarity index 78%
copy from public/web/WebLeakDetector.h
copy to public/platform/WebScrollOffsetAnimationCurve.h
index 652fd3b709b03a39f68f44385f212c792e77ae7c..ee9e1f974df56d31874479762bc062b6a318106f 100644
--- a/public/web/WebLeakDetector.h
+++ b/public/platform/WebScrollOffsetAnimationCurve.h
@@ -28,21 +28,24 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebLeakDetector_h
-#define WebLeakDetector_h
+#ifndef WebScrollOffsetAnimationCurve_h
+#define WebScrollOffsetAnimationCurve_h
 
-#include "public/platform/WebCommon.h"
+#include "WebAnimationCurve.h"
 
-namespace blink {
+#include "WebFloatPoint.h"
 
-class WebFrame;
+namespace blink {
 
-class WebLeakDetector {
+class WebScrollOffsetAnimationCurve : public WebAnimationCurve {
 public:
-    // Cleans up the DOM objects and counts them. This is supposed to be used for detecting DOM-object leaks.
-    BLINK_EXPORT static void collectGarbargeAndGetDOMCounts(WebFrame*, unsigned* numberOfLiveDocuments, unsigned* numberOfLiveNodes);
+    virtual ~WebScrollOffsetAnimationCurve() { }
+
+    virtual void setInitialValue(WebFloatPoint) = 0;
+    virtual WebFloatPoint getValue(double time) const = 0;
+    virtual double duration() const = 0;
 };
 
 } // namespace blink
 
-#endif // WebLeakDetector_h
+#endif // WebScrollOffsetAnimationCurve_h