CallbackPromiseAdapter types should be more compatible with WebCallbacks (2/3).

content/child/push_messaging/push_provider.cc

Index: content/child/push_messaging/push_provider.cc
diff --git a/content/child/push_messaging/push_provider.cc b/content/child/push_messaging/push_provider.cc
index 515c3fe5cf0f487fec5a8b414c7564b260f06ba9..dd0c610c2eaf4316d8054ecfb4db6e4dad2adc28 100644
--- a/content/child/push_messaging/push_provider.cc
+++ b/content/child/push_messaging/push_provider.cc
@@ -183,7 +183,7 @@ void PushProvider::OnUnsubscribeSuccess(int request_id, bool did_unsubscribe) {
   if (!callbacks)
     return;
 
-  callbacks->onSuccess(&did_unsubscribe);
+  callbacks->onSuccess(did_unsubscribe);
 
   unsubscribe_callbacks_.Remove(request_id);
 }
@@ -197,9 +197,8 @@ void PushProvider::OnUnsubscribeError(
   if (!callbacks)
     return;
 
-  scoped_ptr<blink::WebPushError> error(new blink::WebPushError(
+  callbacks->onError(blink::WebPushError(
       error_type, blink::WebString::fromUTF8(error_message)));
-  callbacks->onError(error.release());
 
   unsubscribe_callbacks_.Remove(request_id);
 }