Enable universal accelerated overflow scroll

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1625 matching lines @@
         exceptionState.throwDOMException(InvalidAccessError, ExceptionMessages::argumentNullOrIncorrectType(1, "Element"));
         return String();
     }
 
     FrameView* frameView = element->document().view();
     frameView->updateLayoutAndStyleForPainting();
 
     return elementLayerTreeAsText(element, 0, exceptionState);
 }
 
-static PassRefPtr<NodeList> paintOrderList(Element* element, ExceptionState& exceptionState, RenderLayerStackingNode::PaintOrderListType type)
-{
-    if (!element) {
-        exceptionState.throwDOMException(InvalidAccessError, ExceptionMessages::argumentNullOrIncorrectType(1, "Element"));
-        return nullptr;
-    }
-
-    element->document().updateLayout();
-
-    RenderObject* renderer = element->renderer();
-    if (!renderer || !renderer->isBox()) {
-        exceptionState.throwDOMException(InvalidAccessError, renderer ? "The provided element's renderer is not a box." : "The provided element has no renderer.");
-        return nullptr;
-    }
-
-    RenderLayer* layer = toRenderBox(renderer)->layer();
-    if (!layer) {
-        exceptionState.throwDOMException(InvalidAccessError, "No render layer can be obtained from the provided element.");
-        return nullptr;
-    }
-
-    Vector<RefPtr<Node> > nodes;
-    layer->stackingNode()->computePaintOrderList(type, nodes);
-    return StaticNodeList::adopt(nodes);
-}
-
-PassRefPtr<NodeList> Internals::paintOrderListBeforePromote(Element* element, ExceptionState& exceptionState)
-{
-    return paintOrderList(element, exceptionState, RenderLayerStackingNode::BeforePromote);
-}
-
-PassRefPtr<NodeList> Internals::paintOrderListAfterPromote(Element* element, ExceptionState& exceptionState)
-{
-    return paintOrderList(element, exceptionState, RenderLayerStackingNode::AfterPromote);
-}
-
 bool Internals::scrollsWithRespectTo(Element* element1, Element* element2, ExceptionState& exceptionState)
 {
     if (!element1 || !element2) {
         exceptionState.throwDOMException(InvalidAccessError, String::format("The %s element provided is invalid.", element1 ? "second" : "first"));
         return 0;
     }
 
     element1->document().updateLayout();
 
     RenderObject* renderer1 = element1->renderer();
@@ skipping 34 matching lines @@
 
     RenderLayer* layer = toRenderBox(renderer)->layer();
     if (!layer) {
         exceptionState.throwDOMException(InvalidAccessError, "No render layer can be obtained from the provided element.");
         return 0;
     }
 
     return layer->isUnclippedDescendant();
 }
 
-bool Internals::needsCompositedScrolling(Element* element, ExceptionState& exceptionState)
-{
-    if (!element) {
-        exceptionState.throwDOMException(InvalidAccessError, ExceptionMessages::argumentNullOrIncorrectType(1, "Element"));
-        return 0;
-    }
-
-    element->document().view()->updateLayoutAndStyleForPainting();
-
-    RenderObject* renderer = element->renderer();
-    if (!renderer || !renderer->isBox()) {
-        exceptionState.throwDOMException(InvalidAccessError, renderer ? "The provided element's renderer is not a box." : "The provided element has no renderer.");
-        return 0;
-    }
-
-    RenderLayer* layer = toRenderBox(renderer)->layer();
-    if (!layer) {
-        exceptionState.throwDOMException(InvalidAccessError, "No render layer can be obtained from the provided element.");
-        return 0;
-    }
-
-    return layer->needsCompositedScrolling();
-}
-
 String Internals::layerTreeAsText(Document* document, unsigned flags, ExceptionState& exceptionState) const
 {
     if (!document || !document->frame()) {
         exceptionState.throwDOMException(InvalidAccessError, document ? "The document's frame cannot be retrieved." : "The document provided is invalid.");
         return String();
     }
 
     document->view()->updateLayoutAndStyleForPainting();
 
     return document->frame()->layerTreeAsText(flags);
@@ skipping 661 matching lines @@
 String Internals::textSurroundingNode(Node* node, int x, int y, unsigned long maxLength)
 {
     if (!node)
         return String();
     blink::WebPoint point(x, y);
     SurroundingText surroundingText(VisiblePosition(node->renderer()->positionForPoint(static_cast<IntPoint>(point))), maxLength);
     return surroundingText.content();
 }
 
 }