Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp

Index: third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp
index e9822d64966240aab3459894a912d07e2c127c3e..8e38df9831252715c1ce9489b05e604defe07ec5 100644
--- a/third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSLengthListInterpolationType.cpp
@@ -11,8 +11,6 @@
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSValueList.h"
 #include "core/css/resolver/StyleResolverState.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
@@ -57,9 +55,9 @@ class ParentLengthListChecker : public InterpolationType::ConversionChecker {
 public:
     ~ParentLengthListChecker() final {}
 
-    static std::unique_ptr<ParentLengthListChecker> create(CSSPropertyID property, const Vector<Length>& inheritedLengthList)
+    static PassOwnPtr<ParentLengthListChecker> create(CSSPropertyID property, const Vector<Length>& inheritedLengthList)
     {
-        return wrapUnique(new ParentLengthListChecker(property, inheritedLengthList));
+        return adoptPtr(new ParentLengthListChecker(property, inheritedLengthList));
     }
 
 private: