sync: make scheduling logic and job ownership more obvious.

sync/internal_api/public/sessions/model_neutral_state.h

 // Copyright (c) 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 SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H
 #define SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H
 
 #include "base/basictypes.h"
 #include "sync/internal_api/public/util/syncer_error.h"
 #include "sync/protocol/sync.pb.h"
@@ skipping 57 matching lines @@
 
   // True indicates debug info has been sent once this session.
   bool debug_info_sent;
 
   // Number of changes remaining, according to the server.
   // Take it as an estimate unless it's value is zero, in which case there
   // really is nothing more to download.
   int64 num_server_changes_remaining;
 };
 
+bool HasSyncerError(const ModelNeutralState& state);
+
 }  // namespace sessions
 }  // namespace syncer
 
 #endif  // SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H_