Revert of [Chromoting] Add DataChannelManager to manage optional incoming data channels

remoting/protocol/fake_message_pipe.h

-// Copyright 2017 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 REMOTING_PROTOCOL_FAKE_MESSAGE_PIPE_H_
-#define REMOTING_PROTOCOL_FAKE_MESSAGE_PIPE_H_
-
-#include <memory>
-
-#include "remoting/protocol/message_pipe.h"
-
-namespace google {
-namespace protobuf {
-class MessageLite;
-}  // namespace protobuf
-}  // namespace google
-
-namespace remoting {
-namespace protocol {
-
-class FakeMessagePipeWrapper;
-
-class FakeMessagePipe final : public MessagePipe {
- public:
-  explicit FakeMessagePipe(bool asynchronous);
-  ~FakeMessagePipe() override;
-
-  // Creates an std::unique_ptr<FakeMessagePipeWrapper> instance to wrap |this|.
-  // All operations will be forwarded to |this| except for the destructor.
-  //
-  // Most of the components take ownership of std::unique_ptr<MessagePipe>,
-  // which makes the test cases hard to maintain the lifetime of a
-  // FakeMessagePipe. So this function creates a "weak" unique_ptr of this
-  // instance to let the test case decide the lifetime of a FakeMessagePipe.
-  std::unique_ptr<FakeMessagePipeWrapper> Wrap();
-
-  // MessagePipe implementation.
-  void Start(EventHandler* event_handler) override;
-  void Send(google::protobuf::MessageLite* message,
-            const base::Closure& done) override;
-
-  // Forwards |message| to EventHandler.
-  void Receive(std::unique_ptr<CompoundBuffer> message);
-
-  // Simulates the operation to open the pipe.
-  void OpenPipe();
-
-  // Simulates the operation to close the pipe.
-  void ClosePipe();
-
- private:
-  void SendImpl(google::protobuf::MessageLite* message,
-                const base::Closure& done);
-  void ReceiveImpl(std::unique_ptr<CompoundBuffer> message);
-  void OpenPipeImpl();
-  void ClosePipeImpl();
-
-  const bool asynchronous_;
-  bool pipe_opened_ = false;
-  EventHandler* event_handler_ = nullptr;
-};
-
-}  // namespace protocol
-}  // namespace remoting
-
-#endif  // REMOTING_PROTOCOL_FAKE_MESSAGE_PIPE_H_