Revert "Move mojo edk into mojo/edk"

mojo/edk/system/proxy_message_pipe_endpoint.h

-// 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.
-
-#ifndef MOJO_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_
-#define MOJO_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "mojo/edk/system/message_in_transit.h"
-#include "mojo/edk/system/message_pipe_endpoint.h"
-#include "mojo/edk/system/system_impl_export.h"
-
-namespace mojo {
-namespace system {
-
-class ChannelEndpoint;
-class LocalMessagePipeEndpoint;
-class MessagePipe;
-
-// A |ProxyMessagePipeEndpoint| is an endpoint which delegates everything to a
-// |ChannelEndpoint|, which may be co-owned by a |Channel|. Like any
-// |MessagePipeEndpoint|, a |ProxyMessagePipeEndpoint| is owned by a
-// |MessagePipe|.
-//
-// For example, a |MessagePipe| with one endpoint local and the other endpoint
-// remote consists of a |LocalMessagePipeEndpoint| and a
-// |ProxyMessagePipeEndpoint|, with only the local endpoint being accessible via
-// a |MessagePipeDispatcher|.
-class MOJO_SYSTEM_IMPL_EXPORT ProxyMessagePipeEndpoint
-    : public MessagePipeEndpoint {
- public:
-  explicit ProxyMessagePipeEndpoint(ChannelEndpoint* channel_endpoint);
-  virtual ~ProxyMessagePipeEndpoint();
-
-  // |MessagePipeEndpoint| implementation:
-  virtual Type GetType() const override;
-  virtual bool OnPeerClose() override;
-  virtual void EnqueueMessage(scoped_ptr<MessageInTransit> message) override;
-  virtual void Close() override;
-
- private:
-  void DetachIfNecessary();
-
-  scoped_refptr<ChannelEndpoint> channel_endpoint_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProxyMessagePipeEndpoint);
-};
-
-}  // namespace system
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_