GitLab

Bluetooth detection on Mac triggers 500ms adapter polling and causes
performance regression. Since Easy unlock is only offered on ChromeOS
at the moment, disable Bluetooth detection for other platforms while
the polling problem is investigated.

BUG=404482,399067

Review URL: https://codereview.chromium.org/498453002

Cr-Commit-Position: refs/heads/master@{#291409}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291409 0039d316-1c4b-4281-b951-d872f2087c98