Move ScrollableArea timer to TaskRunnerTimer.

third_party/WebKit/Source/platform/scroll/ScrollableArea.h

 /*
  * Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 348 matching lines @@
   // Need to promptly let go of owned animator objects.
   EAGERLY_FINALIZE();
   DECLARE_VIRTUAL_TRACE();
 
   virtual void clearScrollableArea();
 
   virtual ScrollAnchor* scrollAnchor() { return nullptr; }
 
   virtual void didScrollWithScrollbar(ScrollbarPart, ScrollbarOrientation) {}
 
+  // Returns the task runner to be used for scrollable area timers.
+  // Ideally a frame-specific throttled one can be used.
+  virtual RefPtr<WebTaskRunner> getTimerTaskRunner() const;
+
  protected:
   ScrollableArea();
 
   ScrollbarOrientation scrollbarOrientationFromDirection(
       ScrollDirectionPhysical) const;
   float scrollStep(ScrollGranularity, ScrollbarOrientation) const;
 
   void setScrollOrigin(const IntPoint&);
   void resetScrollOriginChanged() { m_scrollOriginChanged = false; }
 
@@ skipping 34 matching lines @@
   virtual void updateScrollOffset(const ScrollOffset&, ScrollType) = 0;
 
   virtual int lineStep(ScrollbarOrientation) const;
   virtual int pageStep(ScrollbarOrientation) const;
   virtual int documentStep(ScrollbarOrientation) const;
   virtual float pixelStep(ScrollbarOrientation) const;
 
   mutable Member<ScrollAnimatorBase> m_scrollAnimator;
   mutable Member<ProgrammaticScrollAnimator> m_programmaticScrollAnimator;
 
-  std::unique_ptr<Timer<ScrollableArea>> m_fadeOverlayScrollbarsTimer;
+  std::unique_ptr<TimerBase> m_fadeOverlayScrollbarsTimer;

[haraken, 2017/01/20 05:45:51]

Can we use TimerTaskRunner?

Can we make this TaskTimerRunner<ScrollableArea>?

[jbroman, 2017/01/20 15:55:17]

Changed to TaskRunnerTimer<ScrollableArea>.

 
   unsigned m_scrollbarOverlayColorTheme : 2;
 
   unsigned m_scrollOriginChanged : 1;
 
   unsigned m_horizontalScrollbarNeedsPaintInvalidation : 1;
   unsigned m_verticalScrollbarNeedsPaintInvalidation : 1;
   unsigned m_scrollCornerNeedsPaintInvalidation : 1;
   unsigned m_scrollbarsHidden : 1;
   unsigned m_scrollbarCaptured : 1;
   unsigned m_mouseOverScrollbar : 1;
 
   // There are 6 possible combinations of writing mode and direction. Scroll
   // origin will be non-zero in the x or y axis if there is any reversed
   // direction or writing-mode. The combinations are:
   // writing-mode / direction     scrollOrigin.x() set    scrollOrigin.y() set
   // horizontal-tb / ltr          NO                      NO
   // horizontal-tb / rtl          YES                     NO
   // vertical-lr / ltr            NO                      NO
   // vertical-lr / rtl            NO                      YES
   // vertical-rl / ltr            YES                     NO
   // vertical-rl / rtl            YES                     YES
   IntPoint m_scrollOrigin;
 };
 
 }  // namespace blink
 
 #endif  // ScrollableArea_h