[chrome.cast.channel] Remove event logging.

extensions/browser/api/cast_channel/logger_util.h

-// Copyright 2014 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 EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_UTIL_H_
-#define EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_UTIL_H_
-
-#include "extensions/common/api/cast_channel.h"
-#include "extensions/common/api/cast_channel/logging.pb.h"
-
-namespace extensions {
-namespace api {
-namespace cast_channel {
-// Converts an IDL "ChannelError" to a proto enum "ErrorState".
-proto::ErrorState ErrorStateToProto(ChannelError state);
-
-// Converts an IDL "ReadyState" to a proto enum "ReadyState".
-proto::ReadyState ReadyStateToProto(ReadyState state);
-
-// Holds the most recent errors encountered by a CastSocket.
-struct LastErrors {
- public:
-  LastErrors();
-  ~LastErrors();
-
-  // The most recent event that occurred at the time of the error.
-  proto::EventType event_type;
-
-  // The most recent ChallengeReplyErrorType logged for the socket.
-  proto::ChallengeReplyErrorType challenge_reply_error_type;
-
-  // The most recent net_return_value logged for the socket.
-  int net_return_value;
-};
-
-}  // namespace cast_channel
-}  // namespace api
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_UTIL_H_