TLS channel id 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 ad2928e16172f262aba580eb4449f02b1b5dd880..f9ee9ef8baa6cf9c968b67837864ef4fb1e565fa 100644
--- a/net/base/ssl_config_service.cc
+++ b/net/base/ssl_config_service.cc
@@ -74,6 +74,7 @@ SSLConfigService::SSLConfigService()
 }
 
 static bool g_cached_info_enabled = false;
+static bool g_channel_id_trial = false;
 
 // GlobalCRLSet holds a reference to the global CRLSet. It simply wraps a lock
 // around a scoped_refptr so that getting a reference doesn't race with
@@ -132,6 +133,11 @@ uint16 SSLConfigService::default_version_max() {
   return g_default_version_max;
 }
 
+// static
+void SSLConfigService::EnableChannelIDTrial() {
+  g_channel_id_trial = true;
+}
+
 void SSLConfigService::AddObserver(Observer* observer) {
   observer_list_.AddObserver(observer);
 }
@@ -146,6 +152,8 @@ SSLConfigService::~SSLConfigService() {
 // static
 void SSLConfigService::SetSSLConfigFlags(SSLConfig* ssl_config) {
   ssl_config->cached_info_enabled = g_cached_info_enabled;
+  if (g_channel_id_trial)
+    ssl_config->channel_id_enabled = true;
 }
 
 void SSLConfigService::ProcessConfigUpdate(const SSLConfig& orig_config,