Simplify data channel creation logic in WebRTC-based protocol

remoting/protocol/connection_tester.h

 // Copyright (c) 2012 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_CONNECTION_TESTER_H_
 #define REMOTING_PROTOCOL_CONNECTION_TESTER_H_
 
 #include <list>
 #include <memory>
 #include <vector>
@@ skipping 103 matching lines @@
   MessagePipeConnectionTester(MessagePipe* client_pipe,
                               MessagePipe* host_pipe,
                               int message_size,
                               int message_count);
   ~MessagePipeConnectionTester() override;
 
   void RunAndCheckResults();
 
  protected:
   // MessagePipe::EventHandler interface.
+  void OnMessagePipeOpen() override;
   void OnMessageReceived(std::unique_ptr<CompoundBuffer> message) override;
   void OnMessagePipeClosed() override;
 
  private:
   base::RunLoop run_loop_;
   MessagePipe* host_pipe_;
   MessagePipe* client_pipe_;
   int message_size_;
   int message_count_;
 
   std::vector<std::unique_ptr<VideoPacket>> sent_messages_;
   std::vector<std::unique_ptr<VideoPacket>> received_messages_;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONNECTION_TESTER_H_