https://bugs.webkit.org/show_bug.cgi?id=86585

Reviewed by Hajime Morita.

Since Node::shadowHost() and Node::setShadowHost() are valid only if Node is ShadowRoot,
they should be moved to ShadowRoot.

However, Node::setParent cannot be called from ShadowRoot, we add Node::setParentOrHostNode
to call it as Node::parentOrHostNode() calls Node::parent(). Node::setParent() is now private.
We also add SVGElementInstance::setParentOrHostNode() to share ContainerNodeAlgorithm.

No new tests, no change in behavior.

* dom/Attr.cpp:
(WebCore::Attr::createTextChild):
* dom/ContainerNode.cpp:
(WebCore::ContainerNode::insertBeforeCommon):
(WebCore::ContainerNode::removeBetween):
(WebCore::ContainerNode::removeChildren):
* dom/ContainerNodeAlgorithms.h:
(WebCore::appendChildToContainer):
(WebCore::Private::addChildNodesToDeletionQueue):
* dom/ElementShadow.cpp:
(WebCore::validateShadowRoot):
(WebCore::ElementShadow::addShadowRoot):
(WebCore::ElementShadow::removeAllShadowRoots):
* dom/EventDispatcher.cpp:
(WebCore::eventTargetRespectingSVGTargetRules):
(WebCore::EventDispatcher::ensureEventAncestors):
(WebCore::EventDispatcher::determineDispatchBehavior):
* dom/EventDispatcher.h:
(WebCore):
(EventDispatcher):
* dom/Node.cpp:
(WebCore::Node::parentOrHostElement):
* dom/Node.h:
(Node):
(WebCore::Node::setParentOrHostNode):
(WebCore):
* dom/NodeRenderingContext.cpp:
(WebCore::NodeRenderingContext::NodeRenderingContext):
* dom/ShadowRoot.h:
(WebCore::ShadowRoot::host):
(WebCore):
(WebCore::ShadowRoot::setHost):
* dom/TreeScope.cpp:
(WebCore::TreeScope::focusedNode):
* html/shadow/ContentSelectorQuery.cpp:
(WebCore::ContentSelectorQuery::matches):
* page/DragController.cpp:
(WebCore::asFileInput):
* page/EventHandler.cpp:
(WebCore::EventHandler::handleMousePressEvent):
(WebCore::instanceAssociatedWithShadowTreeElement):
(WebCore::EventHandler::dispatchMouseEvent):
* page/FocusController.cpp:
(WebCore::FocusScope::owner):
* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::hasLineIfEmpty):
* svg/SVGElementInstance.h:
(WebCore::SVGElementInstance::setParentOrHostNode):
(SVGElementInstance):
* svg/SVGStyledElement.cpp:
(WebCore::SVGStyledElement::title):
* svg/SVGTRefElement.cpp:
(WebCore::SVGShadowText::willRecalcTextStyle):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@117723 268f45cc-cd09-0410-ab3c-d52691b4dbfc