Allow raw string literals and add a sample usage.

This was tentatively approved on the discussion thread two months ago.

BUG=none
TEST=none

Review-Url: https://codereview.chromium.org/2470643002
Cr-Original-Commit-Position: refs/heads/master@{#429402}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: bf8b8103771747ed31d3af4e924de7cd27607deb
1 file changed
tree: 7e781512cb52b409897ca65c86abe91f65bf9a86
  1. tools/