Take MT jank into account when animating the scroll offset on CC

cc/input/input_handler.h

Index: cc/input/input_handler.h
diff --git a/cc/input/input_handler.h b/cc/input/input_handler.h
index 30ac88d425665f7786501a4e6a7f3f6e0281e8f2..b8ddffc23f05ae53527ae82e411188883d9f0f75 100644
--- a/cc/input/input_handler.h
+++ b/cc/input/input_handler.h
@@ -130,7 +130,8 @@ class CC_EXPORT InputHandler {
       const gfx::Point& viewport_point) = 0;
 
   virtual ScrollStatus ScrollAnimated(const gfx::Point& viewport_point,
-                                      const gfx::Vector2dF& scroll_delta) = 0;
+                                      const gfx::Vector2dF& scroll_delta,
+                                      const ui::LatencyInfo* latency) = 0;
 
   // Scroll the layer selected by |ScrollBegin| by given |scroll_state| delta.
   // Internally, the delta is transformed to local layer's coordinate space for