Mojo: Abstract out the endpoints of MessagePipes.

mojo/system/message_pipe_endpoint.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/system/message_pipe_endpoint.h"
+
+#include "base/logging.h"
+
+namespace mojo {
+namespace system {
+
+void MessagePipeEndpoint::CancelAllWaiters() {
+  NOTREACHED();
+}
+
+void MessagePipeEndpoint::Close() {
+  NOTREACHED();
+}
+
+MojoResult MessagePipeEndpoint::ReadMessage(
+    void* /*bytes*/, uint32_t* /*num_bytes*/,
+    MojoHandle* /*handles*/, uint32_t* /*num_handles*/,
+    MojoReadMessageFlags /*flags*/) {
+  NOTREACHED();
+  return MOJO_RESULT_INTERNAL;
+}
+
+MojoResult MessagePipeEndpoint::AddWaiter(Waiter* /*waiter*/,
+                                          MojoWaitFlags /*flags*/,
+                                          MojoResult /*wake_result*/) {
+  NOTREACHED();
+  return MOJO_RESULT_INTERNAL;
+}
+
+void MessagePipeEndpoint::RemoveWaiter(Waiter* /*waiter*/) {
+  NOTREACHED();
+}
+
+}  // namespace system
+}  // namespace mojo
+