Cube: Use ElapsedTimer::start_new()

Author: https://github.com/bgianfo
Commit: ddfdfc2342
Pull-request: https://github.com/SerenityOS/serenity/pull/9999
Reviewed-by: https://github.com/awesomekling ✅

Userland/Demos/Cube/Cube.cpp

@@ -83,8 +83,7 @@ void Cube::paint_event(GUI::PaintEvent& event)
 
 void Cube::timer_event(Core::TimerEvent&)
 {
-    Core::ElapsedTimer timer;
-    timer.start();
+    auto timer = Core::ElapsedTimer::start_new();
 
     const FloatVector3 vertices[8] {
         { -1, -1, -1 },