Revert "Remove OwnPtr from Blink."

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

Index: third_party/WebKit/Source/core/animation/CSSInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSInterpolationType.cpp
index a5041dc5689fd0e317797a549d9abda154c88993..0778f779007514b1f9b973096a277207c7645ef9 100644
--- a/third_party/WebKit/Source/core/animation/CSSInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSInterpolationType.cpp
@@ -10,16 +10,14 @@
 #include "core/css/resolver/CSSVariableResolver.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "platform/RuntimeEnabledFeatures.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 class ResolvedVariableChecker : public InterpolationType::ConversionChecker {
 public:
-    static std::unique_ptr<ResolvedVariableChecker> create(CSSPropertyID property, const CSSVariableReferenceValue* variableReference, const CSSValue* resolvedValue)
+    static PassOwnPtr<ResolvedVariableChecker> create(CSSPropertyID property, const CSSVariableReferenceValue* variableReference, const CSSValue* resolvedValue)
     {
-        return wrapUnique(new ResolvedVariableChecker(property, variableReference, resolvedValue));
+        return adoptPtr(new ResolvedVariableChecker(property, variableReference, resolvedValue));
     }
 
 private: