[sync] Componentize sync: Part 2: Add SYNC_EXPORTs to files in src/sync/

sync/internal_api/public/util/syncer_error.h

Index: sync/internal_api/public/util/syncer_error.h
diff --git a/sync/internal_api/public/util/syncer_error.h b/sync/internal_api/public/util/syncer_error.h
index 4e70dc13549af56280121f09b251d5e852b8f56d..f3ee9eef2626f0b6781e0f856a114ee00d57fa7b 100644
--- a/sync/internal_api/public/util/syncer_error.h
+++ b/sync/internal_api/public/util/syncer_error.h
@@ -1,10 +1,12 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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 SYNC_INTERNAL_API_PUBLIC_UTIL_SYNCER_ERROR_H_
 #define SYNC_INTERNAL_API_PUBLIC_UTIL_SYNCER_ERROR_H_
 
+#include "sync/base/sync_export.h"
+
 namespace syncer {
 
 // This enum describes all the ways a SyncerCommand can fail.
@@ -41,7 +43,7 @@ enum SyncerError {
   SYNCER_OK
 };
 
-const char * GetSyncerErrorString(SyncerError);
+SYNC_EXPORT const char* GetSyncerErrorString(SyncerError);
 
 // Helper to check that |error| is set to something (not UNSET) and is not
 // SYNCER_OK.