[Sync] Convert sync to a static library.

components/sync/protocol/sync_protocol_error.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_PROTOCOL_SYNC_PROTOCOL_ERROR_H_
 #define COMPONENTS_SYNC_PROTOCOL_SYNC_PROTOCOL_ERROR_H_
 
 #include <string>
 
 #include "base/values.h"
 #include "components/sync/base/model_type.h"
-#include "components/sync/base/sync_export.h"
 
 namespace syncer {
 
 enum SyncProtocolErrorType {
   // Success case.
   SYNC_SUCCESS,
 
   // Birthday does not match that of the server.
   NOT_MY_BIRTHDAY,
 
@@ skipping 48 matching lines @@
   STOP_SYNC_FOR_DISABLED_ACCOUNT,
 
   // Generated in response to CLIENT_DATA_OBSOLETE error. ProfileSyncService
   // should stop sync engine, delete directory and restart sync engine.
   RESET_LOCAL_SYNC_DATA,
 
   // The default. No action.
   UNKNOWN_ACTION
 };
 
-struct SYNC_EXPORT SyncProtocolError {
+struct SyncProtocolError {
   SyncProtocolErrorType error_type;
   std::string error_description;
   std::string url;
   ClientAction action;
   ModelTypeSet error_data_types;
   SyncProtocolError();
   SyncProtocolError(const SyncProtocolError& other);
   ~SyncProtocolError();
   base::DictionaryValue* ToValue() const;
 };
 
-SYNC_EXPORT const char* GetSyncErrorTypeString(SyncProtocolErrorType type);
-SYNC_EXPORT const char* GetClientActionString(ClientAction action);
+const char* GetSyncErrorTypeString(SyncProtocolErrorType type);
+const char* GetClientActionString(ClientAction action);
 }  // namespace syncer
 #endif  // COMPONENTS_SYNC_PROTOCOL_SYNC_PROTOCOL_ERROR_H_