Cleanup remaining class/struct fwd declarations

google_apis/gcm/base/mcs_util.h

 // Copyright 2013 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.
 //
 // Utility methods for MCS interactions.
 
 #ifndef GOOGLE_APIS_GCM_BASE_MCS_UTIL_H_
 #define GOOGLE_APIS_GCM_BASE_MCS_UTIL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "google_apis/gcm/base/gcm_export.h"
 #include "google_apis/gcm/protocol/mcs.pb.h"
 
 namespace base {
 class Clock;
 }
 
-namespace net {
-class StreamSocket;
-}
-
 namespace gcm {
 
 // MCS Message tags.
 // WARNING: the order of these tags must remain the same, as the tag values
 // must be consistent with those used on the server.
 enum MCSProtoTag {
   kHeartbeatPingTag = 0,
   kHeartbeatAckTag,
   kLoginRequestTag,
   kLoginResponseTag,
@@ skipping 52 matching lines @@
                               base::Clock* clock);
 GCM_EXPORT int GetTTL(const google::protobuf::MessageLite& protobuf);
 
 // Returns whether the message was sent with an immediate ack request.
 GCM_EXPORT bool IsImmediateAckRequested(
     const google::protobuf::MessageLite& protobuf);
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_BASE_MCS_UTIL_H_