Removed CSSDisplayContents runtime flag.

In stable since M65.

Bug: 657748
Change-Id: I25bd7ae44e3084b3a198eff6bad811118a460d52
Reviewed-on: https://chromium-review.googlesource.com/1156548
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579437}
2 files changed