TelemetryLogWriter cleanups

remoting/signaling/chromoting_event_log_writer.h

-// Copyright 2016 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_SIGNALING_CHROMOTING_EVENT_LOG_WRITER_H_
-#define REMOTING_SIGNALING_CHROMOTING_EVENT_LOG_WRITER_H_
-
-namespace remoting {
-
-class ChromotingEvent;
-
-class ChromotingEventLogWriter {
- public:
-  virtual ~ChromotingEventLogWriter() {};
-
-  virtual void SetAuthToken(const std::string& auth_token) = 0;
-  virtual void SetAuthClosure(const base::Closure& closure) = 0;
-  virtual void Log(const ChromotingEvent& entry) = 0;
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_SIGNALING_CHROMOTING_EVENT_LOG_WRITER_H_