Mac color: Apply Sierra workaround unconditionally

This was accidentally enabled on just <10.12. It didn't cause any
issues, so expand to 10.12.

BUG=633805

Review-Url: https://codereview.chromium.org/2405883002
Cr-Commit-Position: refs/heads/master@{#424190}
(cherry picked from commit 139c0a4a023d168763f0983bebe2790b38419bb2)

Review URL: https://codereview.chromium.org/2412123002 .

Cr-Commit-Position: refs/branch-heads/2883@{#60}
Cr-Branched-From: 614d31daee2f61b0180df403a8ad43f20b9f6dd7-refs/heads/master@{#423768}
1 file changed