Enable tools/perf_expectations PRESUBMIT.py check on windows.

Due to file separator differences, the PRESUMIT.py would never run on
windows. This CL simply converts windows path seperators to unix style
ones.

Bug: 750406
Change-Id: I9523387a350abe70d68918398c65e989055cf27c
Reviewed-on: https://chromium-review.googlesource.com/599121
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Doug Turner <dougt@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#492428}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3e82be64bb15f9176e2af945bb995d69f200f606
1 file changed