Mark TimeRanges as shipped in Firefox 4 (#8735)
Mark TimeRanges as shipped in Firefox 4 (#8735)

This matches api.HTMLMediaElement.buffered, the first property that used
TimeRanges.

This was implemented in https://bugzilla.mozilla.org/show_bug.cgi?id=589561,
which by the date also matches Firefox 4.

State of the IDL file in the last patch on the bug:
https://hg.mozilla.org/mozilla-central/file/37f61e9d618a32ade3367c514598454b9b735a54/dom/interfaces/html/nsIDOMTimeRanges.idl
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data