Add revocation checking field trial.

net/base/ssl_config_service.h

Index: net/base/ssl_config_service.h
diff --git a/net/base/ssl_config_service.h b/net/base/ssl_config_service.h
index c44937e7878527093bf848937b26dc73d6c924c9..d80937bbbed851b55afab4d549eba9a8f44c5bdb 100644
--- a/net/base/ssl_config_service.h
+++ b/net/base/ssl_config_service.h
@@ -142,6 +142,11 @@ class NET_API SSLConfigService
   static void EnableDNSCertProvenanceChecking();
   static bool dns_cert_provenance_checking_enabled();
 
+  // Disabled revocation checking for some sites that we have additional
+  // security on.
+  static void DisableRevCheckingForPinnedSites();
+  static bool rev_checking_disabled_for_pinned_sites();
+
   // Is SNI available in this configuration?
   static bool IsSNIAvailable(SSLConfigService* service);