Wrapped PassRefPtrs in move where passed to RefPtr constructor.

third_party/WebKit/Source/core/css/CSSVariableReferenceValue.h

 // Copyright 2015 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 CSSVariableReferenceValue_h
 #define CSSVariableReferenceValue_h
 
 #include "core/css/CSSValue.h"
 #include "core/css/CSSVariableData.h"
 #include "wtf/RefPtr.h"
@@ skipping 10 matching lines @@
 
   bool equals(const CSSVariableReferenceValue& other) const {
     return m_data == other.m_data;
   }
   String customCSSText() const;
 
   DECLARE_TRACE_AFTER_DISPATCH();
 
  private:
   CSSVariableReferenceValue(PassRefPtr<CSSVariableData> data)
-      : CSSValue(VariableReferenceClass), m_data(data) {}
+      : CSSValue(VariableReferenceClass), m_data(std::move(data)) {}
 
   RefPtr<CSSVariableData> m_data;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSVariableReferenceValue,
                             isVariableReferenceValue());
 
 }  // namespace blink
 
 #endif  // CSSVariableReferenceValue_h