cc: Delay start of scrollbar animation setNeedsRedraw.

cc/scrollbar_animation_controller_linear_fade.h

Index: cc/scrollbar_animation_controller_linear_fade.h
diff --git a/cc/scrollbar_animation_controller_linear_fade.h b/cc/scrollbar_animation_controller_linear_fade.h
index 709bddedde887625913ac950f88827591bec3387..81dba2576a73ac3ca8f56c61e0429e3411d45db1 100644
--- a/cc/scrollbar_animation_controller_linear_fade.h
+++ b/cc/scrollbar_animation_controller_linear_fade.h
@@ -14,18 +14,22 @@ class LayerImpl;
 
 class CC_EXPORT ScrollbarAnimationControllerLinearFade : public ScrollbarAnimationController {
 public:
-    static scoped_ptr<ScrollbarAnimationControllerLinearFade> create(LayerImpl* scrollLayer, double fadeoutDelay, double fadeoutLength);
+    static scoped_ptr<ScrollbarAnimationControllerLinearFade> create(LayerImpl* scrollLayer, base::TimeDelta fadeoutDelay, base::TimeDelta fadeoutLength);
 
     virtual ~ScrollbarAnimationControllerLinearFade();
 
     // ScrollbarAnimationController overrides.
+    virtual bool isScrollGestureInProgress() const OVERRIDE;
+    virtual bool isAnimating() const OVERRIDE;
+    virtual base::TimeDelta delayBeforeStart(base::TimeTicks now) const OVERRIDE;
+
     virtual bool animate(base::TimeTicks) OVERRIDE;
-    virtual void didPinchGestureUpdate(base::TimeTicks) OVERRIDE;
-    virtual void didPinchGestureEnd(base::TimeTicks) OVERRIDE;
-    virtual void didUpdateScrollOffset(base::TimeTicks) OVERRIDE;
+    virtual void didScrollGestureBegin() OVERRIDE;
+    virtual void didScrollGestureEnd(base::TimeTicks now) OVERRIDE;
+    virtual void didProgrammaticallyUpdateScroll(base::TimeTicks now) OVERRIDE;
 
 protected:
-    ScrollbarAnimationControllerLinearFade(LayerImpl* scrollLayer, double fadeoutDelay, double fadeoutLength);
+    ScrollbarAnimationControllerLinearFade(LayerImpl* scrollLayer, base::TimeDelta fadeoutDelay, base::TimeDelta fadeoutLength);
 
 private:
     float opacityAtTime(base::TimeTicks);
@@ -33,10 +37,10 @@ private:
     LayerImpl* m_scrollLayer;
 
     base::TimeTicks m_lastAwakenTime;
-    bool m_pinchGestureInEffect;
+    bool m_scrollGestureInProgress;
 
-    double m_fadeoutDelay;
-    double m_fadeoutLength;
+    base::TimeDelta m_fadeoutDelay;
+    base::TimeDelta m_fadeoutLength;
 
     double m_currentTimeForTesting;
 };