Input latency performance test that uses tracing.

chrome/test/perf/browser_perf_test.h

Index: chrome/test/perf/browser_perf_test.h
diff --git a/chrome/test/perf/browser_perf_test.h b/chrome/test/perf/browser_perf_test.h
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index 0000000000000000000000000000000000000000..282d88cd289b0a9254da1aa787a87fd7fcff0a05
--- /dev/null
+++ b/chrome/test/perf/browser_perf_test.h
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+// 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.
+
+#ifndef CHROME_TEST_PERF_BROWSER_PERF_TEST_H_
+#define CHROME_TEST_PERF_BROWSER_PERF_TEST_H_
+#pragma once
+
+#include "chrome/test/base/in_process_browser_test.h"
+
+class CommandLine;
+
+class BrowserPerfTest : public InProcessBrowserTest {
+ public:
+  BrowserPerfTest();
+  virtual ~BrowserPerfTest();
+
+  // Set up common browser perf test flags. Typically call down to this if
+  // overridden.
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE;
+
+  // Prints IO performance data for use by perf graphs.
+  void PrintIOPerfInfo(const std::string& test_name);
+
+  // Prints memory usage data for use by perf graphs.
+  void PrintMemoryUsageInfo(const std::string& test_name);
+};
+
+#endif  // CHROME_TEST_PERF_BROWSER_PERF_TEST_H_