Mojo C++ bindings: Simplify associated interface API.

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

Index: mojo/public/cpp/bindings/lib/pipe_control_message_proxy.cc
diff --git a/mojo/public/cpp/bindings/lib/pipe_control_message_proxy.cc b/mojo/public/cpp/bindings/lib/pipe_control_message_proxy.cc
index 30daac7f825ec1945b43b233473f0af9024da342..701108e1637cb7dd40e66fb6d7ade1c38301bf4d 100644
--- a/mojo/public/cpp/bindings/lib/pipe_control_message_proxy.cc
+++ b/mojo/public/cpp/bindings/lib/pipe_control_message_proxy.cc
@@ -48,20 +48,6 @@ void PipeControlMessageProxy::NotifyPeerEndpointClosed(
   ALLOW_UNUSED_LOCAL(ok);
 }
 
-void PipeControlMessageProxy::NotifyEndpointClosedBeforeSent(InterfaceId id) {
-  DCHECK(!IsMasterInterfaceId(id));
-
-  auto event = pipe_control::AssociatedEndpointClosedBeforeSentEvent::New();
-  event->id = id;
-
-  auto input = pipe_control::RunOrClosePipeInput::New();
-  input->set_associated_endpoint_closed_before_sent_event(std::move(event));
-
-  Message message(ConstructRunOrClosePipeMessage(std::move(input)));
-  bool ok = receiver_->Accept(&message);
-  ALLOW_UNUSED_LOCAL(ok);
-}
-
 // static
 Message PipeControlMessageProxy::ConstructPeerEndpointClosedMessage(
     InterfaceId id,