Revert "Remove OwnPtr from Blink."

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

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef PropertySetCSSStyleDeclaration_h
 #define PropertySetCSSStyleDeclaration_h
 
 #include "core/css/CSSStyleDeclaration.h"
 #include "wtf/HashMap.h"
+#include "wtf/OwnPtr.h"
 
 namespace blink {
 
 class CSSRule;
 class CSSValue;
 class Element;
 class ExceptionState;
 class MutableStylePropertySet;
 class StyleSheetContents;
 
@@ skipping 84 matching lines @@
     Element* parentElement() const override { return m_parentElement; }
 
     void didMutate(MutationType) override;
 
     Member<Element> m_parentElement;
 };
 
 } // namespace blink
 
 #endif