Implement easy GPU feature status summary.

chrome/browser/resources/gpu_internals/tracing_controller_tests.js

+// Copyright (c) 2011 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.
+var tracingControllerTestEvents;
+var allTracingControllerTestDataSets;
+(function() {
+   var dataSets = [
+     {
+       name: "big_trace",
+       events: 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