Add another CHECK to diagnose Android crash.

chrome/browser/metrics/field_trial_synchronizer.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/field_trial_synchronizer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/threading/thread.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 33 matching lines @@
           content::RenderProcessHost::AllHostsIterator());
        !it.IsAtEnd(); it.Advance()) {
     it.GetCurrentValue()->Send(
         new ChromeViewMsg_SetFieldTrialGroup(field_trial_name, group_name));
   }
 }
 
 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized(
     const std::string& field_trial_name,
     const std::string& group_name) {
+  // TODO(asvitkine): Remove these CHECKs once http://crbug.com/359406 is fixed.
   CHECK(!field_trial_name.empty() && !group_name.empty());
+  CHECK_EQ(group_name, base::FieldTrialList::FindFullName(field_trial_name))
+      << field_trial_name << ":" << group_name << "=>"
+      << base::FieldTrialList::FindFullName(field_trial_name);
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers,
                  this,
                  field_trial_name,
                  group_name));
   variations::SetVariationListCrashKeys();
 }
 
 FieldTrialSynchronizer::~FieldTrialSynchronizer() {
   base::FieldTrialList::RemoveObserver(this);
   g_field_trial_synchronizer = NULL;
 }