Let MediaError.MEDIA_ERR_ENCRYPTED depend on EncryptedMediaAnyVersion

Also fix the indentation.

BUG=310641

Review URL: https://codereview.chromium.org/48573004

git-svn-id: svn://svn.chromium.org/blink/trunk@160808 bbb929c8-8fbe-4397-9dbb-9b2b20218538