Fixed up root scroller API to be more webby

third_party/WebKit/Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 104 matching lines @@
 class HTMLImportLoader;
 class HTMLImportsController;
 class HTMLLinkElement;
 class HTMLScriptElementOrSVGScriptElement;
 class HitTestRequest;
 class IdleRequestCallback;
 class IdleRequestOptions;
 class InputDeviceCapabilities;
 class IntersectionObserverController;
 class LayoutPoint;
+class LayoutView;
 class LayoutViewItem;
 class LiveNodeListBase;
 class LocalDOMWindow;
 class Locale;
 class LocalFrame;
 class Location;
 class MainThreadTaskRunner;
 class MediaQueryListListener;
 class MediaQueryMatcher;
 class NodeFilter;
 class NodeIntersectionObserverData;
 class NodeIterator;
 class NthIndexCache;
 class OriginAccessEntry;
 class Page;
 class PlatformMouseEvent;
 class ProcessingInstruction;
 class QualifiedName;
 class Range;
-class LayoutView;
 class ResourceFetcher;
+class RootScroller;
 class SVGDocumentExtensions;
 class SVGUseElement;
 class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
 class ScriptedIdleTaskController;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
 class SerializedScriptValue;
@@ skipping 918 matching lines @@
 
     void enforceStrictMixedContentChecking();
 
     bool mayContainV0Shadow() const { return m_mayContainV0Shadow; }
 
     ShadowCascadeOrder shadowCascadeOrder() const { return m_shadowCascadeOrder; }
     void setShadowCascadeOrder(ShadowCascadeOrder);
 
     bool containsV1ShadowTree() const { return m_shadowCascadeOrder == ShadowCascadeOrder::ShadowCascadeV1; }
 
+    Element* rootScroller() const;
     void setRootScroller(Element*, ExceptionState&);
-    Element* rootScroller();
+    bool isEffectiveRootScroller(const Element&) const;
 
     bool isInMainFrame() const;
 
 protected:
     Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
 
     void didUpdateSecurityOrigin() final;
 
     void clearXMLVersion() { m_xmlVersion = String(); }
 
@@ skipping 135 matching lines @@
 
     bool m_hasAutofocused;
     Timer<Document> m_clearFocusedElementTimer;
     Member<Element> m_autofocusElement;
     Member<Element> m_focusedElement;
     Member<Range> m_sequentialFocusNavigationStartingPoint;
     Member<Node> m_hoverNode;
     Member<Element> m_activeHoverElement;
     Member<Element> m_documentElement;
     UserActionElementSet m_userActionElements;
+    Member<RootScroller> m_rootScroller;
 
     uint64_t m_domTreeVersion;
     static uint64_t s_globalTreeVersion;
 
     uint64_t m_styleVersion;
 
     HeapHashSet<WeakMember<NodeIterator>> m_nodeIterators;
     using AttachedRangeSet = HeapHashSet<WeakMember<Range>>;
     AttachedRangeSet m_ranges;
 
@@ skipping 200 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h