[LayoutNG] Add out-of-flow descendants and offsets to NGPhysicalFragment

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment_base.cc

 // Copyright 2016 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.
 
 #include "core/layout/ng/ng_physical_fragment_base.h"
 
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_physical_text_fragment.h"
 
 namespace blink {
 
 DEFINE_TRACE(NGPhysicalFragmentBase) {
   if (Type() == FragmentText)
     static_cast<NGPhysicalTextFragment*>(this)->traceAfterDispatch(visitor);
   else
     static_cast<NGPhysicalFragment*>(this)->traceAfterDispatch(visitor);
 }
 
+void NGPhysicalFragmentBase::finalizeGarbageCollectedObject() {
+  if (Type() == FragmentText)
+    static_cast<NGPhysicalTextFragment*>(this)->~NGPhysicalTextFragment();
+  else
+    static_cast<NGPhysicalFragment*>(this)->~NGPhysicalFragment();
+}
+
 }  // namespace blink