Suppress scrollbar animation if the scroll gesture does not scroll

cc/animation/scrollbar_animation_controller.h

Index: cc/animation/scrollbar_animation_controller.h
diff --git a/cc/animation/scrollbar_animation_controller.h b/cc/animation/scrollbar_animation_controller.h
index 55d2945768950e5ba9ab73dba84ac54bbf786f33..94c953e93088fc5d076c45cc5f24ec7ab4f51474 100644
--- a/cc/animation/scrollbar_animation_controller.h
+++ b/cc/animation/scrollbar_animation_controller.h
@@ -18,14 +18,13 @@ class CC_EXPORT ScrollbarAnimationController {
  public:
   virtual ~ScrollbarAnimationController() {}
 
-  virtual bool IsScrollGestureInProgress() const = 0;
   virtual bool IsAnimating() const = 0;
   virtual base::TimeDelta DelayBeforeStart(base::TimeTicks now) const = 0;
 
   virtual bool Animate(base::TimeTicks now) = 0;
   virtual void DidScrollGestureBegin() = 0;
   virtual void DidScrollGestureEnd(base::TimeTicks now) = 0;
-  virtual void DidProgrammaticallyUpdateScroll(base::TimeTicks now) = 0;
+  virtual void DidScrollUpdate(base::TimeTicks now) = 0;
 };
 
 }  // namespace cc