Remove BLINK_SCALE_FILTERS_AT_RECORD_TIME #ifdef.

Remove the above #ifdef, unused now that crrev.com/288436 has landed.

BUG=281516

Review URL: https://codereview.chromium.org/461693002

git-svn-id: svn://svn.chromium.org/blink/trunk@179986 bbb929c8-8fbe-4397-9dbb-9b2b20218538