[Sync] Removing duplicated includes between cc and h files.

components/sync/test/engine/mock_update_handler.cc

 // Copyright 2014 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 "components/sync/test/engine/mock_update_handler.h"
 
 #include <string>
 
-#include "components/sync/base/model_type.h"
-
 namespace syncer {
 
 MockUpdateHandler::MockUpdateHandler(ModelType type)
     : apply_updates_count_(0), passive_apply_updates_count_(0) {
   progress_marker_.set_data_type_id(GetSpecificsFieldNumberFromModelType(type));
   const std::string& token_str =
       std::string("Mock token: ") + std::string(ModelTypeToString(type));
   progress_marker_.set_token(token_str);
 }
 
@@ skipping 32 matching lines @@
 
 int MockUpdateHandler::GetApplyUpdatesCount() {
   return apply_updates_count_;
 }
 
 int MockUpdateHandler::GetPassiveApplyUpdatesCount() {
   return passive_apply_updates_count_;
 }
 
 }  // namespace syncer