Plumb smooth scrolling in Chromium compositor

content/renderer/input/input_handler_wrapper.cc

Index: content/renderer/input/input_handler_wrapper.cc
diff --git a/content/renderer/input/input_handler_wrapper.cc b/content/renderer/input/input_handler_wrapper.cc
index d5596bdcc207bd2bcf91673194e2e9a84fb38351..1e75cf6cb805c3f87a3cbbd99d21688b243f7f37 100644
--- a/content/renderer/input/input_handler_wrapper.cc
+++ b/content/renderer/input/input_handler_wrapper.cc
@@ -47,6 +47,17 @@ blink::WebGestureCurve* InputHandlerWrapper::CreateFlingAnimationCurve(
       deviceSource, velocity, cumulative_scroll);
 }
 
+blink::WebGestureCurve* InputHandlerWrapper::CreateSmoothScrollAnimationCurve(
+    blink::WebGestureDevice deviceSource,
+    float start_x,
+    float start_y,
+    float dx,
+    float dy,
+    long duration) {
+  return blink::Platform::current()->createSmoothScrollAnimationCurve(
+      deviceSource, start_x, start_y, dx, dy, duration);
+}
+
 void InputHandlerWrapper::DidOverscroll(const DidOverscrollParams& params) {
   input_handler_manager_->DidOverscroll(routing_id_, params);
 }