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

chrome/browser/extensions/extension_proxy_api_constants.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.
 
 // Constants for the Chrome Extensions Proxy Settings API.
 
 #include "chrome/browser/extensions/extension_proxy_api_constants.h"
 
 #include "base/basictypes.h"
 
 namespace extension_proxy_api_constants {
 
 const char kProxyConfigMode[] = "mode";
 const char kProxyConfigPacScript[] = "pacScript";
+const char kProxyConfigPacScriptMandatory[] = "mandatory";
 const char kProxyConfigPacScriptUrl[] = "url";
 const char kProxyConfigPacScriptData[] = "data";
 const char kProxyConfigRules[] = "rules";
 const char kProxyConfigRuleHost[] = "host";
 const char kProxyConfigRulePort[] = "port";
 const char kProxyConfigRuleScheme[] = "scheme";
 const char kProxyConfigBypassList[] = "bypassList";
 const char kProxyConfigValue[] = "value";
 
 const char kProxyEventFatal[] = "fatal";
@@ skipping 18 matching lines @@
 
 COMPILE_ASSERT(SCHEME_MAX == SCHEME_FALLBACK,
                SCHEME_MAX_must_equal_SCHEME_FALLBACK);
 COMPILE_ASSERT(arraysize(field_name) == SCHEME_MAX + 1,
                field_name_array_is_wrong_size);
 COMPILE_ASSERT(arraysize(scheme_name) == SCHEME_MAX + 1,
                scheme_name_array_is_wrong_size);
 COMPILE_ASSERT(SCHEME_ALL == 0, singleProxy_must_be_first_option);
 
 }  // namespace extension_proxy_api_constants