Fix GN bootstrap

TBR=brettw

Bug: none
Change-Id: Ic9a0355edaeedb73bdfa03ef3f5a5e45974cf567
Reviewed-on: https://chromium-review.googlesource.com/608236
Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#492960}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: c338d43f49c0d72e69cd6e40eeaf4c0597dbdda1
diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index ff2ae57..55500ad 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -550,8 +550,6 @@
       'base/trace_event/memory_peak_detector.cc',
       'base/trace_event/memory_usage_estimator.cc',
       'base/trace_event/process_memory_dump.cc',
-      'base/trace_event/process_memory_maps.cc',
-      'base/trace_event/process_memory_totals.cc',
       'base/trace_event/sharded_allocation_register.cc',
       'base/trace_event/trace_buffer.cc',
       'base/trace_event/trace_config.cc',