sync: Follow-up to conflict resolution refactor

sync/engine/nudge_source.cc

 // 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.
 
 #include "sync/engine/nudge_source.h"
 
 #include "base/logging.h"
 
 namespace syncer {
 
 #define ENUM_CASE(x) case x: return #x; break
 
 const char* GetNudgeSourceString(NudgeSource nudge_source) {
   switch (nudge_source) {
     ENUM_CASE(NUDGE_SOURCE_UNKNOWN);
     ENUM_CASE(NUDGE_SOURCE_NOTIFICATION);
     ENUM_CASE(NUDGE_SOURCE_LOCAL);
-    ENUM_CASE(NUDGE_SOURCE_CONTINUATION);
     ENUM_CASE(NUDGE_SOURCE_LOCAL_REFRESH);
   };
   NOTREACHED();
   return "";
 }
 
 #undef ENUM_CASE
 
 }  // namespace syncer