Mojo: More plumbing to support sending handles over MessagePipes.

mojo/system/local_message_pipe_endpoint.cc

Index: mojo/system/local_message_pipe_endpoint.cc
diff --git a/mojo/system/local_message_pipe_endpoint.cc b/mojo/system/local_message_pipe_endpoint.cc
index 8f1cdf39123f3ab12ab1e3957f92fa560f85968b..2886a1d66537c6d189f6a54917e2ba346c6613bd 100644
--- a/mojo/system/local_message_pipe_endpoint.cc
+++ b/mojo/system/local_message_pipe_endpoint.cc
@@ -51,10 +51,18 @@ bool LocalMessagePipeEndpoint::OnPeerClose() {
   return true;
 }
 
-MojoResult LocalMessagePipeEndpoint::EnqueueMessage(MessageInTransit* message) {
+MojoResult LocalMessagePipeEndpoint::EnqueueMessage(
+    MessageInTransit* message,
+    const std::vector<Dispatcher*>* dispatchers) {
   DCHECK(is_open_);
   DCHECK(is_peer_open_);
 
+  // TODO(vtl)
+  if (dispatchers) {
+    message->Destroy();
+    return MOJO_RESULT_UNIMPLEMENTED;
+  }
+
   bool was_empty = message_queue_.empty();
   message_queue_.push_back(message);
   if (was_empty) {
@@ -70,9 +78,11 @@ void LocalMessagePipeEndpoint::CancelAllWaiters() {
   waiter_list_.CancelAllWaiters();
 }
 
+// TODO(vtl): Support receiving handles.
 MojoResult LocalMessagePipeEndpoint::ReadMessage(
     void* bytes, uint32_t* num_bytes,
-    MojoHandle* handles, uint32_t* num_handles,
+    uint32_t max_num_dispatchers,
+    std::vector<scoped_refptr<Dispatcher> >* dispatchers,
     MojoReadMessageFlags flags) {
   DCHECK(is_open_);
 
@@ -96,10 +106,6 @@ MojoResult LocalMessagePipeEndpoint::ReadMessage(
   else
     not_enough_space = true;
 
-  // TODO(vtl): Support receiving handles.
-  if (num_handles)
-    *num_handles = 0;
-
   if (!not_enough_space || (flags & MOJO_READ_MESSAGE_FLAG_MAY_DISCARD)) {
     message_queue_.pop_front();
     message->Destroy();