Made PassRefPtr move only and replaced new copies with moves.

third_party/WebKit/Source/core/css/PropertyRegistry.cpp

 // 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/css/PropertyRegistry.h"
 
 namespace blink {
 
 void PropertyRegistry::registerProperty(
     const AtomicString& name,
     const CSSSyntaxDescriptor& syntax,
     bool inherits,
     const CSSValue* initial,
     PassRefPtr<CSSVariableData> initialVariableData) {
   DCHECK(!registration(name));
-  m_registrations.set(
-      name, new Registration(syntax, inherits, initial, initialVariableData));
+  m_registrations.set(name, new Registration(syntax, inherits, initial,
+                                             std::move(initialVariableData)));
 }
 
 const PropertyRegistry::Registration* PropertyRegistry::registration(
     const AtomicString& name) const {
   return m_registrations.get(name);
 }
 
 }  // namespace blink