components: Cleanup class/struct fwd declarations

components/sync/engine_impl/syncer_proto_util.h

 // Copyright 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 COMPONENTS_SYNC_ENGINE_IMPL_SYNCER_PROTO_UTIL_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_SYNCER_PROTO_UTIL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/base/syncer_error.h"
 #include "components/sync/engine_impl/cycle/sync_cycle.h"
 
 namespace sync_pb {
 class ClientToServerMessage;
 class ClientToServerResponse;
 class ClientToServerResponse_Error;
 class CommitResponse_EntryResponse;
 class EntitySpecifics;
 class SyncEntity;
 }
 
 namespace syncer {
 
 class ServerConnectionManager;
-class SyncCycleContext;
 struct SyncProtocolError;
 
 namespace syncable {
 class Directory;
-class Entry;
 }
 
 // Returns the types to migrate from the data in |response|.
 ModelTypeSet GetTypesToMigrate(const sync_pb::ClientToServerResponse& response);
 
 // Builds a SyncProtocolError from the data in |error|.
 SyncProtocolError ConvertErrorPBToSyncProtocolError(
     const sync_pb::ClientToServerResponse_Error& error);
 
 class SyncerProtoUtil {
@@ skipping 95 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, PostAndProcessHeaders);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingNoDatatypes);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingWithDatatypes);
 
   DISALLOW_COPY_AND_ASSIGN(SyncerProtoUtil);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_SYNCER_PROTO_UTIL_H_