Make all gesture scrolls use customization path internally

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 132 matching lines @@
 class QualifiedName;
 class Range;
 class ResourceFetcher;
 class RootScrollerController;
 class SVGDocumentExtensions;
 class SVGUseElement;
 class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
 class ScriptedIdleTaskController;
+class ScrollStateCallback;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
 class SerializedScriptValue;
 class Settings;
 class SnapCoordinator;
 class StyleEngine;
 class StyleResolver;
 class StyleSheet;
 class StyleSheetList;
@@ skipping 913 matching lines @@
 
     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&);
-    bool isEffectiveRootScroller(const Element&) const;
+    const Element* effectiveRootScroller() const;
+
+    // TODO(bokan): Temporarily added to allow ScrollCustomization to properly
+    // opt out for wheel scrolls. crbug.com/623079.
+    bool isViewportScrollCallback(const ScrollStateCallback*);
 
     bool isInMainFrame() const;
 
 protected:
     Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
 
     void didUpdateSecurityOrigin() final;
 
     void clearXMLVersion() { m_xmlVersion = String(); }
 
@@ skipping 356 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