Add a SafeSearch preference, policy and implementation.

chrome/browser/io_thread.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/io_thread.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 340 matching lines @@
       prefs::kEnableAuthNegotiatePort);
   auth_server_whitelist_ = local_state->GetString(prefs::kAuthServerWhitelist);
   auth_delegate_whitelist_ = local_state->GetString(
       prefs::kAuthNegotiateDelegateWhitelist);
   gssapi_library_name_ = local_state->GetString(prefs::kGSSAPILibraryName);
   pref_proxy_config_tracker_.reset(
       ProxyServiceFactory::CreatePrefProxyConfigTracker(local_state));
   ChromeNetworkDelegate::InitializePrefsOnUIThread(
       &system_enable_referrers_,
       NULL,
+      NULL,
       local_state);
   ssl_config_service_manager_.reset(
       SSLConfigServiceManager::CreateDefaultManager(local_state, NULL));
 
   BrowserThread::SetDelegate(BrowserThread::IO, this);
 }
 
 IOThread::~IOThread() {
   // This isn't needed for production code, but in tests, IOThread may
   // be multiply constructed.
@@ skipping 55 matching lines @@
       extension_event_router_forwarder_;
   ChromeNetworkDelegate* network_delegate = new ChromeNetworkDelegate(
       extension_event_router_forwarder_,
       NULL,
       NULL,
       NULL,
       NULL,
       NULL,
       &system_enable_referrers_,
       NULL,
+      NULL,
       NULL);
   if (command_line.HasSwitch(switches::kDisableExtensionsHttpThrottling))
     network_delegate->NeverThrottleRequests();
   globals_->system_network_delegate.reset(network_delegate);
   globals_->host_resolver = CreateGlobalHostResolver(net_log_);
   globals_->cert_verifier.reset(net::CertVerifier::CreateDefault());
   globals_->transport_security_state.reset(new net::TransportSecurityState());
   globals_->ssl_config_service = GetSSLConfigService();
   if (command_line.HasSwitch(switches::kSpdyProxyOrigin)) {
     spdyproxy_origin_ =
@@ skipping 274 matching lines @@
       new net::HttpNetworkLayer(
           new net::HttpNetworkSession(system_params)));
   globals_->system_ftp_transaction_factory.reset(
       new net::FtpNetworkLayer(globals_->host_resolver.get()));
   globals_->system_request_context.reset(
       ConstructSystemRequestContext(globals_, net_log_));
 
   sdch_manager_->set_sdch_fetcher(
       new SdchDictionaryFetcher(system_url_request_context_getter_.get()));
 }