Removing our beforeunload handler.  It's already void on IE, and Chrome has
a bug (https://code.google.com/p/chromium/issues/detail?id=133625) in which
mailto links may spuriously fire beforeunload events; the handler causes
havoc if we aren't REALLY going away, but its value if fired seems marginal.

    @bug W-2187572@
    @rev dchasman@
Removing our beforeunload handler.  It's already void on IE, and Chrome has
a bug (https://code.google.com/p/chromium/issues/detail?id=133625) in which
mailto links may spuriously fire beforeunload events; the handler causes
havoc if we aren't REALLY going away, but its value if fired seems marginal.

    @bug W-2187572@
    @rev dchasman@
Whitespace
Merging origin/fabbott/master-pending/no-beforeunload into master