cc: Delay start of scrollbar animation setNeedsRedraw.

cc/scrollbar_animation_controller_linear_fade.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_
 #define CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/cc_export.h"
 #include "cc/scrollbar_animation_controller.h"
 
 namespace cc {
 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);
 
     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;
 };
 
 } // namespace cc
 
 #endif  // CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_