anchor.diff:        ..color = colorToCss(titleTextColor)
         ..backgroundColor = colorToCss(titleBackgroundColor);
   
  +    _cpuProfiler = _CpuProfiler(
  +      _timelineController,
  +      () => _timelineController.timeline.data?.cpuProfileData,
  +    )..hidden(true);
  +
       _cpuProfilerTabNav = HtmlCpuProfilerTabNav(
         _cpuProfiler,
         CpuProfilerTabOrder(
  
positive.code:         third: CpuProfilerViewType.bottomUp,
        ),
      );
      _summaryTabNav = PTabNav([PTabNavTab('Summary')])
        ..element.style.borderBottom = '0'
        ..hidden(true);
  
negative.code:       ..layoutVertical()
        ..flex()
        ..add([
          _cpuProfiler,
          // TODO(kenz): eventually we should show something in this area that
          // is useful for GPU events as well (tips, links to docs, etc).
          _eventSummary = HtmlEventSummary(
  