Preparing components_perftests

components/omnibox/browser/history_quick_provider_performance_unittest.cc

+// Copyright 2016 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 "base/time/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+namespace {
+base::TimeDelta EmptyActivity() {
+  base::Time regular_start = base::Time::Now();
+  base::ThreadTicks thread_start;
+  if (base::ThreadTicks::IsSupported())
+    thread_start = base::ThreadTicks::Now();
+
+  LOG(INFO) << "Activly do nothing";
+
+  if (base::ThreadTicks::IsSupported())
+    return base::ThreadTicks::Now() - thread_start;
+
+  return base::Time::Now() - regular_start;
+}
+
+}  // namespace
+
+TEST(BlankPerfTest, BlankActivity) {
+  auto test_info = ::testing::UnitTest::GetInstance()->current_test_info();
+
+  const std::size_t kRepeatCount = 10;
+
+  std::string durations;
+  for (std::size_t i = 0; i < kRepeatCount; ++i)
+    durations += std::to_string(EmptyActivity().InMicroseconds()) + ',';
+
+  perf_test::PrintResultList(test_info->test_case_name(), test_info->name(),
+                             "trace", durations, "ms", true);
+}