Trace-based benchmarking via a mojo app.

apps/benchmark/event.h

Index: apps/benchmark/event.h
diff --git a/apps/benchmark/event.h b/apps/benchmark/event.h
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+++ b/apps/benchmark/event.h
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+// Copyright 2015 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.
+
+#ifndef APPS_BENCHMARK_EVENT_H_
+#define APPS_BENCHMARK_EVENT_H_
+
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "base/values.h"
+
+namespace benchmark {
+
+struct Event {
+  std::string name;
+  std::string category;
+  base::TimeDelta duration;
+  base::TimeTicks timestamp;
+
+  Event();
+  ~Event();
+};
+
+// Walks the JSON tree representing the collected trace events and produces a
+// representation as a list of Events. Stores the outcome in |result| and
+// returns true on success. Returns false on error.
+bool GetEvents(scoped_ptr<base::Value> trace_data, std::vector<Event>* result);
+
+}  // namespace benchmark
+#endif  // APPS_BENCHMARK_EVENT_H_