Update SupportsUserData uses with unique_ptr.

base/supports_user_data.cc

Index: base/supports_user_data.cc
diff --git a/base/supports_user_data.cc b/base/supports_user_data.cc
index 7065917a50519c29a73be3ac2cdad1685e2ac732..675c366d1ee1eb0199251a56fca336000dc4880d 100644
--- a/base/supports_user_data.cc
+++ b/base/supports_user_data.cc
@@ -22,10 +22,6 @@ SupportsUserData::Data* SupportsUserData::GetUserData(const void* key) const {
   return NULL;
 }
 
-void SupportsUserData::SetUserData(const void* key, Data* data) {
-  SetUserData(key, WrapUnique(data));
-}
-
 void SupportsUserData::SetUserData(const void* key,
                                    std::unique_ptr<Data> data) {
   DCHECK(sequence_checker_.CalledOnValidSequence());