GN: fix bootstrap.py due to recent changes in //base

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 82e94e505c98721f4a2ca18e88db384d435ae2a6..8907c1d67a58020943751f8443d47228b81e21ad 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -150,16 +150,17 @@ def write_ninja(path, options):
       'base/command_line.cc',
       'base/debug/alias.cc',
       'base/debug/stack_trace.cc',
+      'base/debug/task_annotator.cc',
       'base/debug/trace_event_impl.cc',
       'base/debug/trace_event_impl_constants.cc',
       'base/debug/trace_event_memory.cc',
       'base/debug/trace_event_synthetic_delay.cc',
       'base/environment.cc',
-      'base/file_util.cc',
       'base/files/file.cc',
       'base/files/file_enumerator.cc',
       'base/files/file_path.cc',
       'base/files/file_path_constants.cc',
+      'base/files/file_util.cc',
       'base/files/scoped_file.cc',
       'base/json/json_parser.cc',
       'base/json/json_reader.cc',
@@ -239,9 +240,9 @@ def write_ninja(path, options):
         'base/base_paths_posix.cc',
         'base/debug/debugger_posix.cc',
         'base/debug/stack_trace_posix.cc',
-        'base/file_util_posix.cc',
         'base/files/file_enumerator_posix.cc',
         'base/files/file_posix.cc',
+        'base/files/file_util_posix.cc',
         'base/message_loop/message_pump_libevent.cc',
         'base/posix/file_descriptor_shuffle.cc',
         'base/process/kill_posix.cc',
@@ -312,7 +313,7 @@ def write_ninja(path, options):
   if is_mac:
     static_libraries['base']['sources'].extend([
         'base/base_paths_mac.mm',
-        'base/file_util_mac.mm',
+        'base/files/file_util_mac.mm',
         'base/mac/bundle_locations.mm',
         'base/mac/foundation_util.mm',
         'base/mac/mach_logging.cc',