Enable (optional) blocking of webrequests in case a PAC script cannot be fetched or is invalid.

chrome/browser/prefs/command_line_pref_store.cc

 // Copyright (c) 2011 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/prefs/command_line_pref_store.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/proxy_config_dictionary.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 68 matching lines @@
 }
 
 void CommandLinePrefStore::ApplyProxyMode() {
   if (command_line_->HasSwitch(switches::kNoProxyServer)) {
     SetValue(prefs::kProxy,
              ProxyConfigDictionary::CreateDirect());
   } else if (command_line_->HasSwitch(switches::kProxyPacUrl)) {
     std::string pac_script_url =
         command_line_->GetSwitchValueASCII(switches::kProxyPacUrl);
     SetValue(prefs::kProxy,
-             ProxyConfigDictionary::CreatePacScript(pac_script_url));
+             ProxyConfigDictionary::CreatePacScript(pac_script_url, false));
   } else if (command_line_->HasSwitch(switches::kProxyAutoDetect)) {
     SetValue(prefs::kProxy,
              ProxyConfigDictionary::CreateAutoDetect());
   } else if (command_line_->HasSwitch(switches::kProxyServer)) {
     std::string proxy_server =
         command_line_->GetSwitchValueASCII(switches::kProxyServer);
     std::string bypass_list =
         command_line_->GetSwitchValueASCII(switches::kProxyBypassList);
     SetValue(prefs::kProxy,
              ProxyConfigDictionary::CreateFixedServers(proxy_server,
                                                        bypass_list));
   }
 }