profiler: cleanup unused alternate_timer code

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 607 matching lines @@
     #"process/process_metrics_freebsd.cc",  # Unused in Chromium build.
     "process/process_metrics_ios.cc",
     "process/process_metrics_linux.cc",
     "process/process_metrics_mac.cc",
 
     #"process/process_metrics_openbsd.cc",  # Unused in Chromium build.
     "process/process_metrics_posix.cc",
     "process/process_metrics_win.cc",
     "process/process_posix.cc",
     "process/process_win.cc",
-    "profiler/alternate_timer.cc",
-    "profiler/alternate_timer.h",
     "profiler/native_stack_sampler.cc",
     "profiler/native_stack_sampler.h",
     "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",
@@ skipping 1498 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }