Fix gn bootstrap after https://codereview.chromium.org/2872503003

tools/gn/bootstrap/bootstrap.py

Index: tools/gn/bootstrap/bootstrap.py
diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index 217add224b9f8973fa8db4feb787daed6eb4b83e..bce7eab68c801f258d59c1097c0fccecb41696de 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -407,6 +407,7 @@ def write_gn_ninja(path, root_gen_dir, options):
       'base/command_line.cc',
       'base/debug/activity_tracker.cc',
       'base/debug/alias.cc',
+      'base/debug/crash_logging.cc',
       'base/debug/dump_without_crashing.cc',
       'base/debug/stack_trace.cc',
       'base/debug/task_annotator.cc',
@@ -675,9 +676,6 @@ def write_gn_ninja(path, root_gen_dir, options):
   if is_mac:
     static_libraries['base']['sources'].extend([
         'base/base_paths_mac.mm',
-        'base/build_time.cc',
-        'base/rand_util.cc',
-        'base/rand_util_posix.cc',
         'base/files/file_util_mac.mm',
         'base/mac/bundle_locations.mm',
         'base/mac/call_with_eh_frame.cc',
@@ -690,12 +688,12 @@ def write_gn_ninja(path, root_gen_dir, options):
         'base/memory/shared_memory_handle_mac.cc',
         'base/memory/shared_memory_mac.cc',
         'base/message_loop/message_pump_mac.mm',
-        'base/metrics/field_trial.cc',
         'base/process/process_handle_mac.cc',
         'base/process/process_info_mac.cc',
         'base/process/process_iterator_mac.cc',
         'base/process/process_metrics_mac.cc',
         'base/strings/sys_string_conversions_mac.mm',
+        'base/sys_info_mac.mm',
         'base/time/time_mac.cc',
         'base/threading/platform_thread_mac.mm',
         'base/trace_event/malloc_dump_provider.cc',
@@ -746,7 +744,6 @@ def write_gn_ninja(path, root_gen_dir, options):
         'base/process/process_win.cc',
         'base/profiler/native_stack_sampler_win.cc',
         'base/profiler/win32_stack_frame_unwinder.cc',
-        'base/rand_util.cc',
         'base/rand_util_win.cc',
         'base/strings/sys_string_conversions_win.cc',
         'base/sync_socket_win.cc',