WebKit's Subversion repo refuses to commit source files that contain
tabs.

Bug: angleproject:3439
Change-Id: I0a804bcfa0375a98e19945e20297c90d31106827
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1954410
Commit-Queue: James Darpinian <jdarpinian@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>