Smoke test for tracing infrastructure in PyAuto

chrome/test/functional/tracing/tracing_test.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.
+
+window.pyautoRecordTrace = function(systemTracing, uuid) {

[nduca, 2012/07/20 07:13:13]

systemTracing -> systemTracingEnabled, copy the style of tracingController

+  'use strict';
+  TimelineModelDecorator.recordTrace(function(model) {

[nduca, 2012/07/20 07:13:13]

I think this record stuff should be in this file, not in the
TimelineModelDecorator.

+    if( window.timelineModelDecorators == undefined )
+    window.timelineModelDecorators = {};
+    window.timelineModelDecorators[uuid] = model;
+    window.domAutomationController.send(uuid);
+  });
+  var willSystemTrace =
+    tracingController.supportsSystemTracing ? systemTracing : false;
+  tracingController.beginTracing(willSystemTrace);
+  return willSystemTrace;
+};
+
+window.domAutomationController.send('');