Remove all members in ScopedStyleTree for preparing class removal

Source/core/css/resolver/StyleResolverParentScope.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef StyleResolverParentScope_h
 #define StyleResolverParentScope_h
 
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
@@ skipping 33 matching lines @@
 }
 
 inline StyleResolverParentScope::~StyleResolverParentScope()
 {
     s_currentScope = m_previous;
     m_resolver.decreaseStyleSharingDepth();
     if (!m_pushed)
         return;
     if (m_parent.isElementNode())
         m_resolver.popParentElement(toElement(m_parent));
-    else
-        m_resolver.popParentShadowRoot(toShadowRoot(m_parent));
 }
 
 inline void StyleResolverParentScope::ensureParentStackIsPushed()
 {
     if (s_currentScope)
         s_currentScope->pushParentIfNeeded();
 }
 
 inline void StyleResolverParentScope::pushParentIfNeeded()
 {
     if (m_pushed)
         return;
     if (m_previous)
         m_previous->pushParentIfNeeded();
     if (m_parent.isElementNode())
         m_resolver.pushParentElement(toElement(m_parent));
-    else
-        m_resolver.pushParentShadowRoot(toShadowRoot(m_parent));
     m_pushed = true;
 }
 
 } // namespace blink
 
 #endif // StyleResolverParentScope_h