chrome://profiler infrastructure uses base time types.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 683 matching lines @@
     "profiler/native_stack_sampler.h",
     "profiler/native_stack_sampler_mac.cc",
     "profiler/native_stack_sampler_posix.cc",
     "profiler/native_stack_sampler_win.cc",
     "profiler/scoped_profile.cc",
     "profiler/scoped_profile.h",
     "profiler/scoped_tracker.cc",
     "profiler/scoped_tracker.h",
     "profiler/stack_sampling_profiler.cc",
     "profiler/stack_sampling_profiler.h",
-    "profiler/tracked_time.cc",
-    "profiler/tracked_time.h",
     "rand_util.cc",
     "rand_util.h",
     "rand_util_nacl.cc",
     "rand_util_posix.cc",
     "rand_util_win.cc",
     "run_loop.cc",
     "run_loop.h",
     "scoped_clear_errno.h",
     "scoped_generic.h",
     "scoped_native_library.cc",
@@ skipping 1417 matching lines @@
     "power_monitor/power_monitor_unittest.cc",
     "process/memory_unittest.cc",
     "process/memory_unittest_mac.h",
     "process/memory_unittest_mac.mm",
     "process/process_info_unittest.cc",
     "process/process_metrics_unittest.cc",
     "process/process_metrics_unittest_ios.cc",
     "process/process_unittest.cc",
     "process/process_util_unittest.cc",
     "profiler/stack_sampling_profiler_unittest.cc",
-    "profiler/tracked_time_unittest.cc",
     "rand_util_unittest.cc",
     "run_loop_unittest.cc",
     "scoped_clear_errno_unittest.cc",
     "scoped_generic_unittest.cc",
     "scoped_native_library_unittest.cc",
     "security_unittest.cc",
     "sequence_checker_unittest.cc",
     "sequence_token_unittest.cc",
     "sequenced_task_runner_unittest.cc",
     "sha1_unittest.cc",
@@ skipping 636 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }