[cast_channel] Clean up CastSocketImpl ctor parameters

extensions/browser/api/cast_channel/cast_channel_enum_util.cc

 // 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.
 
 #include "extensions/browser/api/cast_channel/cast_channel_enum_util.h"
 
 namespace extensions {
 namespace api {
 namespace cast_channel {
 
@@ skipping 39 matching lines @@
     case ::cast_channel::ChannelError::PING_TIMEOUT:
       return CHANNEL_ERROR_PING_TIMEOUT;
     case ::cast_channel::ChannelError::UNKNOWN:
       return CHANNEL_ERROR_UNKNOWN;
   }
   NOTREACHED() << "Unknown channel_error "
                << ChannelErrorToString(channel_error);
   return CHANNEL_ERROR_NONE;
 }
 
-api::cast_channel::ChannelAuthType ToChannelAuthType(
-    ::cast_channel::ChannelAuthType channel_auth) {
-  switch (channel_auth) {
-    case ::cast_channel::ChannelAuthType::NONE:
-      return CHANNEL_AUTH_TYPE_NONE;
-    case ::cast_channel::ChannelAuthType::SSL_VERIFIED:
-      return CHANNEL_AUTH_TYPE_SSL_VERIFIED;
-  }
-  NOTREACHED() << "Unknown channel_auth "
-               << ChannelAuthTypeToString(channel_auth);
-  return CHANNEL_AUTH_TYPE_NONE;
-}
-
-::cast_channel::ChannelAuthType ToChannelAuthTypeInternal(
-    api::cast_channel::ChannelAuthType channel_auth) {
-  switch (channel_auth) {
-    case CHANNEL_AUTH_TYPE_NONE:
-      return ::cast_channel::ChannelAuthType::NONE;
-    case CHANNEL_AUTH_TYPE_SSL_VERIFIED:
-      return ::cast_channel::ChannelAuthType::SSL_VERIFIED;
-  }
-  NOTREACHED() << "Unknown channel_auth " << channel_auth;
-  return ::cast_channel::ChannelAuthType::NONE;
-}
-
 }  // namespace cast_channel
 }  // namespace api
 }  // namespace extensions