Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h

Index: third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h
diff --git a/third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h b/third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h
index 9dd45f92330b66b179515bb4a6d8261c8ce1518d..7104d6daa23c45c9125d662b71d2cba831619383 100644
--- a/third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h
+++ b/third_party/WebKit/Source/core/frame/PageScaleConstraintsSet.h
@@ -37,8 +37,7 @@
 #include "platform/Length.h"
 #include "platform/geometry/IntSize.h"
 #include "wtf/Allocator.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
+#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
@@ -47,9 +46,9 @@ namespace blink {
 class CORE_EXPORT PageScaleConstraintsSet {
     USING_FAST_MALLOC(PageScaleConstraintsSet);
 public:
-    static std::unique_ptr<PageScaleConstraintsSet> create()
+    static PassOwnPtr<PageScaleConstraintsSet> create()
     {
-        return wrapUnique(new PageScaleConstraintsSet);
+        return adoptPtr(new PageScaleConstraintsSet);
     }
 
     void setDefaultConstraints(const PageScaleConstraints&);