Implement Element.scrollIntoView for scroll-behavior: smooth.

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 32 matching lines @@
 #include "platform/FrameViewBase.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/animation/CompositorAnimationHost.h"
 #include "platform/animation/CompositorAnimationTimeline.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/Color.h"
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/scroll/Scrollbar.h"
+#include "platform/scroll/SmoothScrollSequencer.h"
 #include "public/platform/ShapeProperties.h"
 #include "public/platform/WebDisplayMode.h"
 #include "public/platform/WebRect.h"
 #include "wtf/Allocator.h"
 #include "wtf/AutoReset.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/text/WTFString.h"
 
@@ skipping 378 matching lines @@
   CompositorAnimationTimeline* compositorAnimationTimeline() const override;
   LayoutBox* layoutBox() const override;
   FloatQuad localToVisibleContentQuad(const FloatQuad&,
                                       const LayoutObject*,
                                       unsigned = 0) const final;
   RefPtr<WebTaskRunner> getTimerTaskRunner() const final;
 
   LayoutRect scrollIntoView(const LayoutRect& rectInContent,
                             const ScrollAlignment& alignX,
                             const ScrollAlignment& alignY,
-                            ScrollType = ProgrammaticScroll) override;
+                            ScrollType = ProgrammaticScroll,
+                            bool isSmooth = false) override;
 
   // The window that hosts the FrameView. The FrameView will communicate scrolls
   // and repaints to the host window in the window's coordinate space.
   HostWindow* getHostWindow() const;
 
+  SmoothScrollSequencer* getSmoothScrollSequencer() const override;
+
   typedef HeapHashSet<Member<FrameViewBase>> ChildrenSet;
   typedef HeapHashSet<Member<PluginView>> PluginsSet;
 
   // Functions for child manipulation and inspection.
   void setParent(FrameViewBase*) override;
   void removeChild(FrameViewBase*);
   void addChild(FrameViewBase*);
   const ChildrenSet* children() const { return &m_children; }
   void removePlugin(PluginView*);
   void addPlugin(PluginView*);
@@ skipping 794 matching lines @@
                   frameViewBase.isFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isFrameView(),
                   scrollableArea.isFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h