Pass empty cros_user string to GetProfileSyncService() in sync integration tests

chrome/browser/sync/profile_sync_service_harness.cc

 // Copyright (c) 2010 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 "chrome/browser/sync/profile_sync_service_harness.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/message_loop.h"
@@ skipping 112 matching lines @@
   for (int i = syncable::FIRST_REAL_MODEL_TYPE;
       i < syncable::MODEL_TYPE_COUNT; ++i) {
     synced_datatypes.insert(syncable::ModelTypeFromInt(i));
   }
   return SetupSync(synced_datatypes);
 }
 
 bool ProfileSyncServiceHarness::SetupSync(
     const syncable::ModelTypeSet& synced_datatypes) {
   // Initialize the sync client's profile sync service object.
-  service_ = profile_->GetProfileSyncService();
+  service_ = profile_->GetProfileSyncService("");
   if (service_ == NULL) {
     LOG(ERROR) << "SetupSync(): service_ is null.";
     return false;
   }
 
   // Subscribe sync client to notifications from the profile sync service.
   if (!service_->HasObserver(this))
     service_->AddObserver(this);
 
   // Authenticate sync client using GAIA credentials.
@@ skipping 446 matching lines @@
               << ", service_is_pushing_changes: " << ServiceIsPushingChanges();
     } else {
       VLOG(1) << "Client " << id_ << ": " << message
               << ": Sync session snapshot not available.";
     }
   } else {
     VLOG(1) << "Client " << id_ << ": " << message
             << ": Sync service not available.";
   }
 }