Allow about:tracing Counters to be selected

chrome/browser/resources/tracing.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 <include src="gpu_internals/browser_bridge.js">
 <include src="tracing/overlay.js">
 <include src="tracing/tracing_controller.js">
 <include src="tracing/timeline_model.js">
 <include src="tracing/linux_perf_importer.js">
 <include src="tracing/trace_event_importer.js">
 <include src="tracing/sorted_array_utils.js">
 <include src="tracing/measuring_stick.js">
 <include src="tracing/timeline.js">
+<include src="tracing/timeline_analysis.js">
 <include src="tracing/timeline_track.js">
 <include src="tracing/fast_rect_renderer.js">
 <include src="tracing/profiling_view.js">
 <include src="tracing/timeline_view.js">
 
 var browserBridge;
 var tracingController;
 var profilingView;  // Made global for debugging purposes only.
 
 /**
  * Main entry point called once the page has loaded.
  */
 function onLoad() {
   browserBridge = new gpu.BrowserBridge();
   tracingController = new tracing.TracingController();
 
   profilingView = $('profiling-view');
   cr.ui.decorate(profilingView, tracing.ProfilingView);
   profilingView.tracingController = tracingController;
 }
 
 document.addEventListener('DOMContentLoaded', onLoad);