Convert FrameView timer to UnspecedTimer frame-specific timer.

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
    reserved.
 
    This library is free software; you can redistribute it and/or
@@ skipping 1086 matching lines @@
   ViewportConstrainedObjectSet m_backgroundAttachmentFixedObjects;
   Member<FrameViewAutoSizeInfo> m_autoSizeInfo;
 
   IntSize m_inputEventsOffsetForEmulation;
   float m_inputEventsScaleFactorForEmulation;
 
   IntSize m_layoutSize;
   IntSize m_initialViewportSize;
   bool m_layoutSizeFixedToFrameSize;
 
-  Timer<FrameView> m_didScrollTimer;
+  TaskRunnerTimer<FrameView> m_didScrollTimer;
 
   Vector<IntRect> m_tickmarks;
 
   bool m_needsUpdateWidgetGeometries;
 
 #if DCHECK_IS_ON()
   // Verified when finalizing.
   bool m_hasBeenDisposed = false;
 #endif
 
@@ skipping 133 matching lines @@
                   widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isFrameView(),
                   scrollableArea.isFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h