Make RootScroller set the outer viewport scroll layer in the compositor

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 103 matching lines @@
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/LayoutTextFragment.h"
 #include "core/layout/api/LayoutBoxItem.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/page/PointerLockController.h"
 #include "core/page/SpatialNavigation.h"
+#include "core/page/scrolling/RootScrollerController.h"
 #include "core/page/scrolling/ScrollCustomizationCallbacks.h"
 #include "core/page/scrolling/ScrollState.h"
 #include "core/page/scrolling/ScrollStateCallback.h"
 #include "core/paint/PaintLayer.h"
 #include "core/svg/SVGAElement.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGElement.h"
 #include "platform/EventDispatchForbiddenScope.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
@@ skipping 424 matching lines @@
     if (delta.isZero())
         return;
 
     // TODO(esprehn): This should use updateStyleAndLayoutIgnorePendingStylesheetsForNode.
     document().updateStyleAndLayoutIgnorePendingStylesheets();
 
     LayoutBox* boxToScroll = nullptr;
 
     // We should only ever scroll the effective root scroller this way when the
     // page removes the default applyScroll (ViewportScrollCallback).
-    if (document().effectiveRootScroller() == this)
+    if (document().rootScrollerController()->effectiveRootScroller() == this)
         boxToScroll = document().layoutView();
     else if (layoutObject())
         boxToScroll = toLayoutBox(layoutObject());
 
     if (!boxToScroll)
         return;
 
     ScrollResult result =
         LayoutBoxItem(boxToScroll).enclosingBox().scroll(
             ScrollGranularity(static_cast<int>(scrollState.deltaGranularity())),
@@ skipping 3151 matching lines @@
 
 DEFINE_TRACE_WRAPPERS(Element)
 {
     if (hasRareData()) {
         visitor->traceWrappers(elementRareData());
     }
     ContainerNode::traceWrappers(visitor);
 }
 
 } // namespace blink