Remove OwnPtr from Blink.

third_party/WebKit/Source/core/html/HTMLAreaElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2008, 2009, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLAreaElement_h
 #define HTMLAreaElement_h
 
 #include "core/CoreExport.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "platform/geometry/LayoutRect.h"
+#include <memory>
 
 namespace blink {
 
 class HitTestResult;
 class HTMLImageElement;
 class Path;
 
 class CORE_EXPORT HTMLAreaElement final : public HTMLAnchorElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
@@ skipping 21 matching lines @@
     void parseAttribute(const QualifiedName&, const AtomicString&, const AtomicString&) override;
     bool isKeyboardFocusable() const override;
     bool isMouseFocusable() const override;
     bool layoutObjectIsFocusable() const override;
     void updateFocusAppearance(SelectionBehaviorOnFocus) override;
     void setFocus(bool) override;
 
     enum Shape { Default, Poly, Rect, Circle };
     void invalidateCachedPath();
 
-    mutable OwnPtr<Path> m_path;
+    mutable std::unique_ptr<Path> m_path;
     Vector<double> m_coords;
     Shape m_shape;
 };
 
 } // namespace blink
 
 #endif // HTMLAreaElement_h