Remove OwnPtr from Blink.

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

Index: third_party/WebKit/Source/core/animation/InterpolableValue.cpp
diff --git a/third_party/WebKit/Source/core/animation/InterpolableValue.cpp b/third_party/WebKit/Source/core/animation/InterpolableValue.cpp
index 084ecf872d1528bf54715c84fea717f8996105a0..de958c4bb1d3c10f5be733367587413430d416eb 100644
--- a/third_party/WebKit/Source/core/animation/InterpolableValue.cpp
+++ b/third_party/WebKit/Source/core/animation/InterpolableValue.cpp
@@ -4,6 +4,8 @@
 
 #include "core/animation/InterpolableValue.h"
 
+#include <memory>
+
 namespace blink {
 
 bool InterpolableNumber::equals(const InterpolableValue& other) const
@@ -62,9 +64,9 @@ void InterpolableList::interpolate(const InterpolableValue& to, const double pro
     }
 }
 
-PassOwnPtr<InterpolableValue> InterpolableList::cloneAndZero() const
+std::unique_ptr<InterpolableValue> InterpolableList::cloneAndZero() const
 {
-    OwnPtr<InterpolableList> result = InterpolableList::create(m_size);
+    std::unique_ptr<InterpolableList> result = InterpolableList::create(m_size);
     for (size_t i = 0; i < m_size; i++)
         result->set(i, m_values[i]->cloneAndZero());
     return std::move(result);