Input latency performance test that uses tracing.

chrome/test/perf/browser_perf_test.cc

Index: chrome/test/perf/browser_perf_test.cc
diff --git a/chrome/test/perf/browser_perf_test.cc b/chrome/test/perf/browser_perf_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1ea83ed60e06f3726b3758a121c3c300cbbbc5b6
--- /dev/null
+++ b/chrome/test/perf/browser_perf_test.cc
@@ -0,0 +1,34 @@
+// 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.
+
+#include "chrome/test/perf/browser_perf_test.h"
+
+#include "base/command_line.h"
+#include "base/process_util.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/test/base/chrome_process_util.h"
+#include "chrome/test/perf/perf_test.h"
+
+BrowserPerfTest::BrowserPerfTest() {
+}
+
+BrowserPerfTest::~BrowserPerfTest() {
+}
+
+void BrowserPerfTest::SetUpCommandLine(CommandLine* command_line) {
+  // Reduce performance test variance by disabling background networking.
+  command_line->AppendSwitch(switches::kDisableBackgroundNetworking);
+}
+
+void BrowserPerfTest::PrintIOPerfInfo(const std::string& test_name) {
+  base::ProcessId browser_pid = base::GetCurrentProcId();
+  ChromeProcessList chrome_processes(GetRunningChromeProcesses(browser_pid));
+  perf_test::PrintIOPerfInfo(test_name, chrome_processes, browser_pid);
+}
+
+void BrowserPerfTest::PrintMemoryUsageInfo(const std::string& test_name) {
+  base::ProcessId browser_pid = base::GetCurrentProcId();
+  ChromeProcessList chrome_processes(GetRunningChromeProcesses(browser_pid));
+  perf_test::PrintMemoryUsageInfo(test_name, chrome_processes, browser_pid);
+}