Add revocation checking field trial.

net/base/ssl_config_service.cc

Index: net/base/ssl_config_service.cc
diff --git a/net/base/ssl_config_service.cc b/net/base/ssl_config_service.cc
index 56ad78a21d6ca828a11152611fdf22e86f2c54cc..c16e4c52c9190bf3db716268b6ed2bdd7c12ba02 100644
--- a/net/base/ssl_config_service.cc
+++ b/net/base/ssl_config_service.cc
@@ -48,6 +48,7 @@ bool SSLConfigService::IsKnownFalseStartIncompatibleServer(
 
 static bool g_false_start_enabled = true;
 static bool g_dns_cert_provenance_checking = false;
+static bool g_rev_checking_disabled_for_pinned_sites = false;
 
 // static
 void SSLConfigService::DisableFalseStart() {
@@ -69,6 +70,16 @@ bool SSLConfigService::dns_cert_provenance_checking_enabled() {
   return g_dns_cert_provenance_checking;
 }
 
+// static
+void SSLConfigService::DisableRevCheckingForPinnedSites() {
+  g_rev_checking_disabled_for_pinned_sites = true;
+}
+
+// static
+bool SSLConfigService::rev_checking_disabled_for_pinned_sites() {
+  return g_rev_checking_disabled_for_pinned_sites;
+}
+
 void SSLConfigService::AddObserver(Observer* observer) {
   observer_list_.AddObserver(observer);
 }