Remove OwnPtr from Blink.

third_party/WebKit/Source/core/style/CounterDirectives.cpp

Index: third_party/WebKit/Source/core/style/CounterDirectives.cpp
diff --git a/third_party/WebKit/Source/core/style/CounterDirectives.cpp b/third_party/WebKit/Source/core/style/CounterDirectives.cpp
index ce9d391cbf26c52cefc548f5631543b784dbffd7..bbb35268a3b344ded231a15a573339c5c86050af 100644
--- a/third_party/WebKit/Source/core/style/CounterDirectives.cpp
+++ b/third_party/WebKit/Source/core/style/CounterDirectives.cpp
@@ -21,7 +21,8 @@
 
 #include "core/style/CounterDirectives.h"
 
-#include "wtf/PassOwnPtr.h"
+#include "wtf/PtrUtil.h"
+#include <memory>
 
 namespace blink {
 
@@ -33,9 +34,9 @@ bool operator==(const CounterDirectives& a, const CounterDirectives& b)
         && a.resetValue() == b.resetValue();
 }
 
-PassOwnPtr<CounterDirectiveMap> clone(const CounterDirectiveMap& counterDirectives)
+std::unique_ptr<CounterDirectiveMap> clone(const CounterDirectiveMap& counterDirectives)
 {
-    OwnPtr<CounterDirectiveMap> result = adoptPtr(new CounterDirectiveMap);
+    std::unique_ptr<CounterDirectiveMap> result = wrapUnique(new CounterDirectiveMap);
     *result = counterDirectives;
     return result;
 }