const'ify parameters for Element.createShadowRoot

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 1801 matching lines @@
     ensureElementRareData().setCustomElementDefinition(definition);
 }
 
 CustomElementDefinition* Element::customElementDefinition() const
 {
     if (hasRareData())
         return elementRareData()->customElementDefinition();
     return nullptr;
 }
 
-PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(ScriptState* scriptState, ExceptionState& exceptionState)
+PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(const ScriptState* scriptState, ExceptionState& exceptionState)
 {
     OriginsUsingFeatures::count(scriptState, document(), OriginsUsingFeatures::Feature::ElementCreateShadowRoot);
     return createShadowRoot(exceptionState);
 }
 
-PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(ScriptState* scriptState, ShadowRootInit& shadowRootInitDict, ExceptionState& exceptionState)
+PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(const ScriptState* scriptState, const ShadowRootInit& shadowRootInitDict, ExceptionState& exceptionState)
 {
     ASSERT(RuntimeEnabledFeatures::createShadowRootWithParameterEnabled());
     UseCounter::count(document(), UseCounter::ElementCreateShadowRootWithParameter);
 
     OriginsUsingFeatures::count(scriptState, document(), OriginsUsingFeatures::Feature::ElementCreateShadowRoot);
     // TODO(kochi): Add support for closed shadow root. crbug.com/459136
     if (shadowRootInitDict.hasMode() && shadowRootInitDict.mode() == "closed") {
         exceptionState.throwDOMException(NotSupportedError, "Closed shadow root is not implemented yet.");
         return nullptr;
     }
@@ skipping 1593 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink