Store BundleData paths as SourceDirs rather than strings.

R=brettw@chromium.org
BUG=297668

Review URL: https://codereview.chromium.org/1911873002

Cr-Original-Commit-Position: refs/heads/master@{#389110}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 54f052e1445e26b4fd8bd61748f4ee870872c2fa
6 files changed
tree: f8f752af8e56369b39d9d26b8f4b9bdd451bb3e2
  1. tools/