Add Pass(), which implements move semantics, to scoped_ptr, scoped_array, and scoped_ptr_malloc.

base/callback_internal.h

Index: base/callback_internal.h
diff --git a/base/callback_internal.h b/base/callback_internal.h
index 81c87c0aa749759d9dd987aa16fb0fd3c4e9bdef..92740b725765acbfbd93f83908098290c9d691ef 100644
--- a/base/callback_internal.h
+++ b/base/callback_internal.h
@@ -12,6 +12,7 @@
 #include <stddef.h>
 
 #include "base/base_export.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/ref_counted.h"
 
 namespace base {
@@ -130,6 +131,15 @@ struct CallbackParamTraits<T[]> {
   typedef const T* StorageType;
 };
 
+template <typename T>
+class PassScopedWrapper;
+
+template <typename T>
+struct CallbackParamTraits<scoped_ptr<T> > {
+  typedef const PassScopedWrapper<scoped_ptr<T> >& ForwardType;
+  typedef PassScopedWrapper<scoped_ptr<T> > StorageType;
+};
+
 }  // namespace internal
 }  // namespace base