mojo: MessageReceiver*::AcceptWithResponder() now take a unique_ptr to the responder

mojo/public/cpp/bindings/lib/control_message_proxy.cc

Index: mojo/public/cpp/bindings/lib/control_message_proxy.cc
diff --git a/mojo/public/cpp/bindings/lib/control_message_proxy.cc b/mojo/public/cpp/bindings/lib/control_message_proxy.cc
index 23de991309f140b13511d1d7892111e49361a2b6..d082b49fb31df5f7ce537aab476ffae74d918e52 100644
--- a/mojo/public/cpp/bindings/lib/control_message_proxy.cc
+++ b/mojo/public/cpp/bindings/lib/control_message_proxy.cc
@@ -85,9 +85,10 @@ void SendRunMessage(MessageReceiverWithResponder* receiver,
   interface_control::internal::RunMessageParams_Data* params = nullptr;
   Serialize<interface_control::RunMessageParamsDataView>(
       params_ptr, builder.buffer(), &params, &context);
-  MessageReceiver* responder = new RunResponseForwardToCallback(callback);
-  if (!receiver->AcceptWithResponder(builder.message(), responder))
-    delete responder;
+  std::unique_ptr<MessageReceiver> responder =
+      base::MakeUnique<RunResponseForwardToCallback>(callback);
+  ignore_result(
+      receiver->AcceptWithResponder(builder.message(), std::move(responder)));
 }
 
 Message ConstructRunOrClosePipeMessage(
@@ -115,8 +116,7 @@ void SendRunOrClosePipeMessage(
     interface_control::RunOrClosePipeInputPtr input_ptr) {
   Message message(ConstructRunOrClosePipeMessage(std::move(input_ptr)));
 
-  bool ok = receiver->Accept(&message);
-  ALLOW_UNUSED_LOCAL(ok);
+  ignore_result(receiver->Accept(&message));
 }
 
 void RunVersionCallback(