EDK: Add handle rights checking to the various entrypoints.

mojo/edk/system/message_pipe_dispatcher.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/edk/system/message_pipe_dispatcher.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "mojo/edk/system/configuration.h"
@@ skipping 59 matching lines @@
   message_pipe_ = std::move(message_pipe);
   port_ = port;
 }
 
 Dispatcher::Type MessagePipeDispatcher::GetType() const {
   return Type::MESSAGE_PIPE;
 }
 
 bool MessagePipeDispatcher::SupportsEntrypointClass(
     EntrypointClass entrypoint_class) const {
-  return (entrypoint_class == EntrypointClass::MESSAGE_PIPE);
+  return (entrypoint_class == EntrypointClass::NONE ||
+          entrypoint_class == EntrypointClass::MESSAGE_PIPE);
 }
 
 // static
 RefPtr<MessagePipeDispatcher> MessagePipeDispatcher::CreateRemoteMessagePipe(
     RefPtr<ChannelEndpoint>* channel_endpoint) {
   auto message_pipe = MessagePipe::CreateLocalProxy(channel_endpoint);
   auto dispatcher = MessagePipeDispatcher::Create(kDefaultCreateOptions);
   dispatcher->Init(std::move(message_pipe), 0);
   return dispatcher;
 }
@@ skipping 141 matching lines @@
 
   bool rv = message_pipe_->EndSerialize(port_, channel, destination,
                                         actual_size, platform_handles);
   message_pipe_ = nullptr;
   port_ = kInvalidPort;
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo