Compute snap offsets according to CSS Scroll Snap Spec Level 1

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

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 50 matching lines @@
 class IntPoint;
 class IntSize;
 class InstrumentingAgents;
 class LayoutViewItem;
 class LocalDOMWindow;
 class NavigationScheduler;
 class Node;
 class NodeTraversal;
 class Range;
 class LayoutView;
-class TreeScope;
 class ScriptController;
 class ServiceRegistry;
 class SpellChecker;
-class TreeScope;
 class WebFrameHostScheduler;
 class WebFrameScheduler;
 template <typename Strategy> class PositionWithAffinityTemplate;
 
 class CORE_EXPORT LocalFrame : public Frame, public LocalFrameLifecycleNotifier, public Supplementable<LocalFrame> {
     USING_GARBAGE_COLLECTED_MIXIN(LocalFrame);
 public:
     static LocalFrame* create(FrameLoaderClient*, FrameHost*, FrameOwner*, ServiceRegistry* = nullptr);
 
     void init();
@@ skipping 218 matching lines @@
     explicit FrameNavigationDisabler(LocalFrame&);
     ~FrameNavigationDisabler();
 
 private:
     Member<LocalFrame> m_frame;
 };
 
 } // namespace blink
 
 #endif // LocalFrame_h