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

sync/internal_api/sync_manager_impl.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/internal_api/sync_manager_impl.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 1271 matching lines @@
     js_event_handler_.Call(FROM_HERE,
                            &JsEventHandler::HandleJsEvent,
                            "onIncomingNotification",
                            JsEventDetails(&details));
   }
 }
 
 void SyncManagerImpl::RefreshTypes(ModelTypeSet types) {
   DCHECK(thread_checker_.CalledOnValidThread());
   const ModelTypeInvalidationMap& type_invalidation_map =
-      ModelTypeSetToInvalidationMap(types, "");
+      ModelTypeSetToInvalidationMap(types, std::string());
   if (type_invalidation_map.empty()) {
     LOG(WARNING) << "Sync received refresh request with no types specified.";
   } else {
     allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_LOCAL_REFRESH);
     scheduler_->ScheduleNudgeWithStatesAsync(
         TimeDelta::FromMilliseconds(kSyncRefreshDelayMsec),
         NUDGE_SOURCE_LOCAL_REFRESH,
         type_invalidation_map, FROM_HERE);
   }
 
@@ skipping 97 matching lines @@
 int SyncManagerImpl::GetDefaultNudgeDelay() {
   return kDefaultNudgeDelayMilliseconds;
 }
 
 // static.
 int SyncManagerImpl::GetPreferencesNudgeDelay() {
   return kPreferencesNudgeDelayMilliseconds;
 }
 
 }  // namespace syncer