Avoid useless SYNC_CYCLE_CONTINUATION sync cycle

chrome/browser/sync/glue/history_model_worker.h

Index: chrome/browser/sync/glue/history_model_worker.h
diff --git a/chrome/browser/sync/glue/history_model_worker.h b/chrome/browser/sync/glue/history_model_worker.h
index 464ffbc4f6ddea74ef9c0af477081ba3601d1105..187e3db09005aa8df6d7fea3f3b781ca57b2dc70 100644
--- a/chrome/browser/sync/glue/history_model_worker.h
+++ b/chrome/browser/sync/glue/history_model_worker.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include "chrome/browser/sync/engine/model_safe_worker.h"
-#include "chrome/browser/sync/util/unrecoverable_error_info.h"
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
@@ -27,7 +26,7 @@ class HistoryModelWorker : public browser_sync::ModelSafeWorker {
   virtual ~HistoryModelWorker();
 
   // ModelSafeWorker implementation. Called on syncapi SyncerThread.
-  virtual UnrecoverableErrorInfo DoWorkAndWaitUntilDone(
+  virtual SyncerError DoWorkAndWaitUntilDone(
       const WorkCallback& work) OVERRIDE;
   virtual ModelSafeGroup GetModelSafeGroup() OVERRIDE;