Fix GN bootstrap

TBR=brettw

Bug: none
Change-Id: I71fe3a6219a80a900eff82428b507e84b0e4c971
Reviewed-on: https://chromium-review.googlesource.com/700435Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506373}

tools/gn/bootstrap/bootstrap.py

@@ -536,7 +536,6 @@ def write_gn_ninja(path, root_gen_dir, options):
       'base/threading/thread_local_storage.cc',
       'base/threading/thread_restrictions.cc',
       'base/threading/thread_task_runner_handle.cc',
-      'base/threading/worker_pool.cc',
       'base/time/clock.cc',
       'base/time/default_clock.cc',
       'base/time/default_tick_clock.cc',
@@ -546,7 +545,6 @@ def write_gn_ninja(path, root_gen_dir, options):
       'base/timer/timer.cc',
       'base/trace_event/category_registry.cc',
       'base/trace_event/event_name_filter.cc',
-      'base/trace_event/freed_object_tracker.cc',
       'base/trace_event/heap_profiler_allocation_context.cc',
       'base/trace_event/heap_profiler_allocation_context_tracker.cc',
       'base/trace_event/heap_profiler_allocation_register.cc',
@@ -611,7 +609,6 @@ def write_gn_ninja(path, root_gen_dir, options):
         'base/threading/platform_thread_internal_posix.cc',
         'base/threading/platform_thread_posix.cc',
         'base/threading/thread_local_storage_posix.cc',
-        'base/threading/worker_pool_posix.cc',
         'base/time/time_conversion_posix.cc',
         'base/trace_event/heap_profiler_allocation_register_posix.cc',
     ])