karma.base.js: replace "BROWSER" with "BROWSERS" in log messages, to reflect the actual name of the environment variable#8875

dconeybe merged 1 commit intomainfirebase/firebase-js-sdk:mainfrom

dconeybe/KarmaConfBrowserMessageFixfirebase/firebase-js-sdk:dconeybe/KarmaConfBrowserMessageFixCopy head branch name to clipboard