Revert "Added a ForceYouTubeRestrict policy and deprecated the old ForceYouTubeSafetyMode policy"

chrome/browser/profiles/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/profile_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 308 matching lines @@
 
 // static
 const char ProfileImpl::kPrefExitTypeNormal[] = "Normal";
 
 // static
 void ProfileImpl::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(prefs::kSavingBrowserHistoryDisabled, false);
   registry->RegisterBooleanPref(prefs::kAllowDeletingBrowserHistory, true);
   registry->RegisterBooleanPref(prefs::kForceGoogleSafeSearch, false);
-  registry->RegisterIntegerPref(prefs::kForceYouTubeRestrict,
-                                safe_search_util::YOUTUBE_RESTRICT_OFF);
+  registry->RegisterBooleanPref(prefs::kForceYouTubeSafetyMode, false);
   registry->RegisterBooleanPref(prefs::kForceSessionSync, false);
   registry->RegisterStringPref(prefs::kAllowedDomainsForApps, std::string());
 
 #if defined(OS_ANDROID)
   // The following prefs don't need to be sync'd to mobile. This file isn't
   // compiled on iOS so we only need to exclude them syncing from the Android
   // build.
   registry->RegisterIntegerPref(prefs::kProfileAvatarIndex, -1);
   // Whether a profile is using an avatar without having explicitely chosen it
   // (i.e. was assigned by default by legacy profile creation).
@@ skipping 931 matching lines @@
 ProfileImpl::CreateDomainReliabilityMonitor(PrefService* local_state) {
   domain_reliability::DomainReliabilityService* service =
       domain_reliability::DomainReliabilityServiceFactory::GetInstance()->
           GetForBrowserContext(this);
   if (!service)
     return std::unique_ptr<domain_reliability::DomainReliabilityMonitor>();
 
   return service->CreateMonitor(
       BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
 }