Add enterprise policy to allow locally issued SHA-1 certificates.

components/ssl_config/ssl_config_prefs.cc

Index: components/ssl_config/ssl_config_prefs.cc
diff --git a/components/ssl_config/ssl_config_prefs.cc b/components/ssl_config/ssl_config_prefs.cc
index bdd7e21c5029d0d2793e9347c56ae35c1029fe2f..540be23ad3a22009d1685809242dd9d2714b0991 100644
--- a/components/ssl_config/ssl_config_prefs.cc
+++ b/components/ssl_config/ssl_config_prefs.cc
@@ -11,6 +11,7 @@ namespace prefs {
 const char kCertRevocationCheckingEnabled[] = "ssl.rev_checking.enabled";
 const char kCertRevocationCheckingRequiredLocalAnchors[] =
     "ssl.rev_checking.required_for_local_anchors";
+const char kCertEnableSha1LocalAnchors[] = "ssl.sha1_enabled_for_local_anchors";
 const char kSSLVersionMin[] = "ssl.version_min";
 const char kSSLVersionMax[] = "ssl.version_max";
 const char kCipherSuiteBlacklist[] = "ssl.cipher_suites.blacklist";