Revert "Move mojo edk into mojo/edk"

mojo/edk/system/proxy_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/edk/system/proxy_message_pipe_endpoint.h"
-
-#include <string.h>
-
-#include "base/logging.h"
-#include "mojo/edk/system/channel_endpoint.h"
-#include "mojo/edk/system/local_message_pipe_endpoint.h"
-#include "mojo/edk/system/message_pipe_dispatcher.h"
-
-namespace mojo {
-namespace system {
-
-ProxyMessagePipeEndpoint::ProxyMessagePipeEndpoint(
-    ChannelEndpoint* channel_endpoint)
-    : channel_endpoint_(channel_endpoint) {
-}
-
-ProxyMessagePipeEndpoint::~ProxyMessagePipeEndpoint() {
-  DCHECK(!channel_endpoint_.get());
-}
-
-MessagePipeEndpoint::Type ProxyMessagePipeEndpoint::GetType() const {
-  return kTypeProxy;
-}
-
-bool ProxyMessagePipeEndpoint::OnPeerClose() {
-  DetachIfNecessary();
-  return false;
-}
-
-// Note: We may have to enqueue messages even when our (local) peer isn't open
-// -- it may have been written to and closed immediately, before we were ready.
-// This case is handled in |Run()| (which will call us).
-void ProxyMessagePipeEndpoint::EnqueueMessage(
-    scoped_ptr<MessageInTransit> message) {
-  DCHECK(channel_endpoint_.get());
-  LOG_IF(WARNING, !channel_endpoint_->EnqueueMessage(message.Pass()))
-      << "Failed to write enqueue message to channel";
-}
-
-void ProxyMessagePipeEndpoint::Close() {
-  DetachIfNecessary();
-}
-
-void ProxyMessagePipeEndpoint::DetachIfNecessary() {
-  if (channel_endpoint_.get()) {
-    channel_endpoint_->DetachFromMessagePipe();
-    channel_endpoint_ = nullptr;
-  }
-}
-
-}  // namespace system
-}  // namespace mojo