Revert "[Mac] Fix bug where sometimes a tab's close button stays highlighted."

Reverting on branch only, so that crash data from canary isn't worthless

This reverts commit 21404088e7a95e78f193d51e77dcdafdf9057a83.

Cr-Commit-Position: refs/branch-heads/2222@{#2}
Cr-Branched-From: acc3fd852e38c4df2246412376c6429926c99a8c-refs/heads/master@{#304405}
1 file changed