Perform ClientHello padding if the field trial is enabled

net/http/http_network_transaction.cc

Index: net/http/http_network_transaction.cc
diff --git a/net/http/http_network_transaction.cc b/net/http/http_network_transaction.cc
index 8f33e20f3de4fc7845afade160064a802fe73de4..e22d318c3f5a45729b1e5f4e0f689309905b49c3 100644
--- a/net/http/http_network_transaction.cc
+++ b/net/http/http_network_transaction.cc
@@ -180,6 +180,12 @@ int HttpNetworkTransaction::Start(const HttpRequestInfo* request_info,
   if (request_->privacy_mode == PRIVACY_MODE_ENABLED)
     server_ssl_config_.channel_id_enabled = false;
 
+  if (server_ssl_config_.fastradio_padding_enabled) {
+    server_ssl_config_.fastradio_padding_eligible =
+        session_->ssl_config_service()->SupportsFastradioPadding(
+            request_info->url);
+  }
+
   next_state_ = STATE_NOTIFY_BEFORE_CREATE_STREAM;
   int rv = DoLoop(OK);
   if (rv == ERR_IO_PENDING)