Update OS X to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/metrics/metrics_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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It is
@@ skipping 1849 matching lines @@
 }
 
 #if defined(OS_CHROMEOS)
 void MetricsService::StartExternalMetrics() {
   external_metrics_ = new chromeos::ExternalMetrics;
   external_metrics_->Start();
 }
 #endif
 
 bool MetricsService::GzipProtobufsBeforeUploading() {
-  if (!gzipped_protobufs_trial_) {
+  if (!gzipped_protobufs_trial_.get()) {
     gzipped_protobufs_trial_ = base::FieldTrialList::FactoryGetFieldTrial(
         kGzippedProtobufsTrialName,
         kGzippedProtobufsTrialDivisor,
         kNonGzippedProtobufsGroupName,
         2013,
         8,
         1,
         NULL);
     gzipped_protobufs_group_ = gzipped_protobufs_trial_->AppendGroup(
         kGzippedProtobufsGroupName,
         kGzippedProtobufsTrialQuotient);
   }
   return gzipped_protobufs_trial_->group() == gzipped_protobufs_group_;
 }
 
 // static
 bool MetricsServiceHelper::IsMetricsReportingEnabled() {
   bool result = false;
   const PrefService* local_state = g_browser_process->local_state();
   if (local_state) {
     const PrefService::Preference* uma_pref =
         local_state->FindPreference(prefs::kMetricsReportingEnabled);
     if (uma_pref) {
       bool success = uma_pref->GetValue()->GetAsBoolean(&result);
       DCHECK(success);
     }
   }
   return result;
 }