cc: Delay start of scrollbar animation setNeedsRedraw.

cc/scrollbar_animation_controller.h

Index: cc/scrollbar_animation_controller.h
diff --git a/cc/scrollbar_animation_controller.h b/cc/scrollbar_animation_controller.h
index 6345618b19641e75cc6ec2b9af3999e7485ff59b..569f8dc293ad4dc626aa8ea6dee4f033001b8c9a 100644
--- a/cc/scrollbar_animation_controller.h
+++ b/cc/scrollbar_animation_controller.h
@@ -17,9 +17,9 @@ class CC_EXPORT ScrollbarAnimationController {
 public:
     virtual ~ScrollbarAnimationController() {}
 
+    virtual double secondsBeforeStart(base::TimeTicks now) const = 0;
     virtual bool animate(base::TimeTicks) = 0;
     virtual void didPinchGestureUpdate(base::TimeTicks) = 0;
-    virtual void didPinchGestureEnd(base::TimeTicks) = 0;
     virtual void didUpdateScrollOffset(base::TimeTicks) = 0;
 };