Fix inverted early return check in variations simulation code.

chrome/browser/metrics/variations/variations_service.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 "chrome/browser/metrics/variations/variations_service.h"
 
 #include <set>
 
 #include "base/build_time.h"
 #include "base/command_line.h"
@@ skipping 553 matching lines @@
   DoActualFetch();
 
   // This service must have created a scheduler in order for this to be called.
   DCHECK(request_scheduler_.get());
   request_scheduler_->Reset();
 }
 
 void VariationsService::PerformSimulationWithVersion(
     scoped_ptr<variations::VariationsSeed> seed,
     const base::Version& version) {
-  if (version.IsValid())
+  if (!version.IsValid())
     return;
 
   const base::ElapsedTimer timer;
 
   scoped_ptr<const base::FieldTrial::EntropyProvider> entropy_provider =
       state_manager_->CreateEntropyProvider();
   variations::VariationsSeedSimulator seed_simulator(*entropy_provider);
 
   const variations::VariationsSeedSimulator::Result result =
       seed_simulator.SimulateSeedStudies(
@@ skipping 16 matching lines @@
 
 void VariationsService::RecordLastFetchTime() {
   // local_state_ is NULL in tests, so check it first.
   if (local_state_) {
     local_state_->SetInt64(prefs::kVariationsLastFetchTime,
                            base::Time::Now().ToInternalValue());
   }
 }
 
 }  // namespace chrome_variations