Update GN bootstrap file list.

This updates the GN bootstrap build to reflect recent changes in //base:
  - //base/files/file_descriptor_watcher_posix.cc was added
  - //base/memory/ref_counted was re-added
  - //base/trace_event/winheap_dump_provider_win.cc was removed.

R=brettw@chromium.org

Review-Url: https://codereview.chromium.org/2374873002
Cr-Original-Commit-Position: refs/heads/master@{#421381}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: fec688caede93a05edadb944246d5a46f94ec615
1 file changed
tree: c14e288fac3d8768695ac451a33c6aed2d514888
  1. tools/