Continue to clean c_str() calls.

components/policy/core/common/cloud/cloud_policy_core.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 "components/policy/core/common/cloud/cloud_policy_core.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 74 matching lines @@
     UpdateRefreshDelayFromPref();
     for (auto& observer : observers_)
       observer.OnRefreshSchedulerStarted(this);
   }
 }
 
 void CloudPolicyCore::TrackRefreshDelayPref(
     PrefService* pref_service,
     const std::string& refresh_pref_name) {
   refresh_delay_.reset(new IntegerPrefMember());
-  refresh_delay_->Init(
-      refresh_pref_name.c_str(), pref_service,
-      base::Bind(&CloudPolicyCore::UpdateRefreshDelayFromPref,
-                 base::Unretained(this)));
+  refresh_delay_->Init(refresh_pref_name, pref_service,
+                       base::Bind(&CloudPolicyCore::UpdateRefreshDelayFromPref,
+                                  base::Unretained(this)));
   UpdateRefreshDelayFromPref();
 }
 
 void CloudPolicyCore::AddObserver(CloudPolicyCore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void CloudPolicyCore::RemoveObserver(CloudPolicyCore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void CloudPolicyCore::UpdateRefreshDelayFromPref() {
   if (refresh_scheduler_ && refresh_delay_)
     refresh_scheduler_->SetDesiredRefreshDelay(refresh_delay_->GetValue());
 }
 
 }  // namespace policy