gn: Fix more build issues on Win

BUG=354261
R=brettw
TBR=piman,wtc
NOTRY=true

Review URL: https://codereview.chromium.org/603143002

Cr-Commit-Position: refs/heads/master@{#297481}


CrOS-Libchrome-Original-Commit: fc8d7f23b2f20a93c5d987d0c073e892d09f0ade
1 file changed
tree: 9f28152119c29643ea305f706aa2b032309007c6
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/