Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/wtf/Functional.h

Index: third_party/WebKit/Source/wtf/Functional.h
diff --git a/third_party/WebKit/Source/wtf/Functional.h b/third_party/WebKit/Source/wtf/Functional.h
index dd3b7a28f3336a138427df76eaeed26b046ba96d..694963ae2bbf6c31b8e9394669225d86d7af404f 100644
--- a/third_party/WebKit/Source/wtf/Functional.h
+++ b/third_party/WebKit/Source/wtf/Functional.h
@@ -29,6 +29,7 @@
 #include "base/tuple.h"
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/RefPtr.h"
@@ -167,6 +168,12 @@ public:
     }
 
     template <typename... IncomingParameters>
+    R operator()(const PassOwnPtr<C>& c, IncomingParameters&&... parameters)
+    {
+        return (c.get()->*m_function)(std::forward<IncomingParameters>(parameters)...);
+    }
+
+    template <typename... IncomingParameters>
     R operator()(const std::unique_ptr<C>& c, IncomingParameters&&... parameters)
     {
         return (c.get()->*m_function)(std::forward<IncomingParameters>(parameters)...);