Remove obsolete win_pdf_metafile_for_printing GN flag.

Review URL: https://codereview.chromium.org/1552673002

Cr-Original-Commit-Position: refs/heads/master@{#367364}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f5180a8f93deaaeb1032bf9a89a7f00bdc4c31d7
1 file changed
tree: b32868b047f76a7292714e09e0031d649c5ef24f
  1. tools/