Rewrite std::string("") to std::string(), Linux edition.

sync/test/engine/mock_connection_manager.cc

 // 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.
 //
 // Mock ServerConnectionManager class for use in client regression tests.
 
 #include "sync/test/engine/mock_connection_manager.h"
 
 #include <map>
 
@@ skipping 25 matching lines @@
 
 MockConnectionManager::MockConnectionManager(syncable::Directory* directory)
     : ServerConnectionManager("unused", 0, false),
       server_reachable_(true),
       conflict_all_commits_(false),
       conflict_n_commits_(0),
       next_new_id_(10000),
       store_birthday_("Store BDay!"),
       store_birthday_sent_(false),
       client_stuck_(false),
-      commit_time_rename_prepended_string_(""),
       countdown_to_postbuffer_fail_(0),
       directory_(directory),
       mid_commit_observer_(NULL),
       throttling_(false),
       fail_with_auth_invalid_(false),
       fail_non_periodic_get_updates_(false),
       gu_client_command_(NULL),
       commit_client_command_(NULL),
       next_position_in_parent_(2),
       use_legacy_bookmarks_protocol_(false),
@@ skipping 674 matching lines @@
 
 void MockConnectionManager::UpdateConnectionStatus() {
   if (!server_reachable_) {
     server_status_ = HttpResponse::CONNECTION_UNAVAILABLE;
   } else {
     server_status_ = HttpResponse::SERVER_CONNECTION_OK;
   }
 }
 
 }  // namespace syncer