[Cleanup] Const-correct the profile() method for the EasyUnlockService

chrome/browser/profiles/off_the_record_profile_impl.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/profiles/off_the_record_profile_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ skipping 280 matching lines @@
 }
 
 bool OffTheRecordProfileImpl::IsLegacySupervised() {
   return GetOriginalProfile()->IsLegacySupervised();
 }
 
 PrefService* OffTheRecordProfileImpl::GetPrefs() {
   return prefs_;
 }
 
+const PrefService* OffTheRecordProfileImpl::GetPrefs() const {
+  return prefs_;
+}
+
 PrefService* OffTheRecordProfileImpl::GetOffTheRecordPrefs() {
   return prefs_;
 }
 
 DownloadManagerDelegate* OffTheRecordProfileImpl::GetDownloadManagerDelegate() {
   return DownloadServiceFactory::GetForBrowserContext(this)->
       GetDownloadManagerDelegate();
 }
 
 net::URLRequestContextGetter* OffTheRecordProfileImpl::GetRequestContext() {
@@ skipping 252 matching lines @@
 PrefProxyConfigTracker* OffTheRecordProfileImpl::CreateProxyConfigTracker() {
 #if defined(OS_CHROMEOS)
   if (chromeos::ProfileHelper::IsSigninProfile(this)) {
     return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
         g_browser_process->local_state());
   }
 #endif  // defined(OS_CHROMEOS)
   return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
       GetPrefs(), g_browser_process->local_state());
 }