Use kRenderClientId command line flag when starting a render process

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 4e6840a7bf374b2cd1b97b0a3dc987b555cffd12..d120b168175c54120797ee3fc8071bedda2807db 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -865,7 +865,6 @@ bool RenderProcessHostImpl::Init() {
     // in-process plugins.
     options.message_loop_type = base::MessageLoop::TYPE_DEFAULT;
 #endif
-
     // As for execution sequence, this callback should have no any dependency
     // on starting in-process-render-thread.
     // So put it here to trigger ChannelMojo initialization earlier to enable
@@ -1596,6 +1595,8 @@ void RenderProcessHostImpl::AppendRendererCommandLine(
 
   command_line->AppendSwitchASCII(switches::kServiceRequestChannelToken,
                                   child_connection_->service_token());
+  command_line->AppendSwitchASCII(switches::kRendererClientId,
+                                  std::to_string(GetID()));
 }
 
 void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(