New TimeToFirstURLJob* navigation metrics now work with PlzNavigate.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 332b7ec84a98ee2d3eb9ef55ad006f4b1594e59f..ddb8a09744778e82d1a1648abbef5ef688eba9df 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -979,7 +979,9 @@ void ResourceDispatcherHostImpl::OnRequestResource(
   // When logging time-to-network only care about main frame and non-transfer
   // navigations.
   if (request_data.resource_type == RESOURCE_TYPE_MAIN_FRAME &&
-      request_data.transferred_request_request_id == -1) {
+      request_data.transferred_request_request_id == -1 &&
+      !base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation)) {
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,