Revert "Remove OwnPtr from Blink."

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

 /*
  * Copyright (C) 2008 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 11 matching lines @@
  * (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 CSSMatrix_h
 #define CSSMatrix_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/text/WTFString.h"
-#include <memory>
 
 namespace blink {
 
 class ExceptionState;
 class ExecutionContext;
 
 class CSSMatrix final : public GarbageCollectedFinalized<CSSMatrix>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static CSSMatrix* create(const TransformationMatrix& m)
@@ skipping 103 matching lines @@
 
     String toString() const;
 
     DEFINE_INLINE_TRACE() { }
 
 protected:
     CSSMatrix(const TransformationMatrix&);
     CSSMatrix(const String&, ExceptionState&);
 
     // TransformationMatrix needs to be 16-byte aligned. PartitionAlloc
-    // supports 16-byte alignment but Oilpan doesn't. So we use an std::unique_ptr
+    // supports 16-byte alignment but Oilpan doesn't. So we use an OwnPtr
     // to allocate TransformationMatrix on PartitionAlloc.
     // TODO(oilpan): Oilpan should support 16-byte aligned allocations.
-    std::unique_ptr<TransformationMatrix> m_matrix;
+    OwnPtr<TransformationMatrix> m_matrix;
 };
 
 } // namespace blink
 
 #endif // CSSMatrix_h