Metric & meta-metric for CECPQ1 handshake latency.

net/socket/ssl_client_socket.cc

Index: net/socket/ssl_client_socket.cc
diff --git a/net/socket/ssl_client_socket.cc b/net/socket/ssl_client_socket.cc
index be58cea7cd941c440a27f8b99f5088d48153815d..c524ae49479b378b54a1667bd022edf464e14b2e 100644
--- a/net/socket/ssl_client_socket.cc
+++ b/net/socket/ssl_client_socket.cc
@@ -4,9 +4,11 @@
 
 #include "net/socket/ssl_client_socket.h"
 
+#include "base/feature_list.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/strings/string_util.h"
+#include "build/build_config.h"
 #include "crypto/ec_private_key.h"
 #include "net/base/net_errors.h"
 #include "net/socket/ssl_client_socket_impl.h"
@@ -15,6 +17,13 @@
 
 namespace net {
 
+namespace {
+#if !defined(OS_NACL)
+const base::Feature kPostQuantumExperiment{"SSLPostQuantumExperiment",
+                                           base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
+}  // namespace
+
 SSLClientSocket::SSLClientSocket()
     : signed_cert_timestamps_received_(false),
       stapled_ocsp_response_received_(false) {}
@@ -80,6 +89,15 @@ bool SSLClientSocket::IgnoreCertError(int error, int load_flags) {
 }
 
 // static
+bool SSLClientSocket::IsPostQuantumExperimentEnabled() {
+#if !defined(OS_NACL)
+  return base::FeatureList::IsEnabled(kPostQuantumExperiment);
+#else
+  return false;
+#endif
+}
+
+// static
 std::vector<uint8_t> SSLClientSocket::SerializeNextProtos(
     const NextProtoVector& next_protos) {
   std::vector<uint8_t> wire_protos;