Add a SafeSearch preference, policy and implementation.

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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
@@ skipping 222 matching lines @@
 int ProfileImpl::create_readme_delay_ms = 60000;
 
 // static
 const char* const ProfileImpl::kPrefExitTypeNormal = "Normal";
 
 // static
 void ProfileImpl::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kSavingBrowserHistoryDisabled,
                              false,
                              PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kSafeSearchEnabled,
+                             false,
+                             PrefService::UNSYNCABLE_PREF);
   prefs->RegisterIntegerPref(prefs::kProfileAvatarIndex,
                              -1,
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterStringPref(prefs::kProfileName,
                             "",
                             PrefService::SYNCABLE_PREF);
   prefs->RegisterStringPref(prefs::kHomePage,
                             std::string(),
                             PrefService::SYNCABLE_PREF);
 #if defined(ENABLE_PRINTING)
@@ skipping 888 matching lines @@
   if (!path.empty())
     *cache_path = path;
   *max_size = is_media_context ? prefs_->GetInteger(prefs::kMediaCacheSize) :
                                  prefs_->GetInteger(prefs::kDiskCacheSize);
 }
 
 base::Callback<ChromeURLDataManagerBackend*(void)>
     ProfileImpl::GetChromeURLDataManagerBackendGetter() const {
   return io_data_.GetChromeURLDataManagerBackendGetter();
 }