Fix version for api.RTCIceCandidate.toJSON (#12987)
Fix version for api.RTCIceCandidate.toJSON (#12987)

The source of this data is this comment:
https://github.com/mdn/browser-compat-data/pull/4398#pullrequestreview-259567982

However, because of a problem with Chromium's "Find Releases" tool,
Chrome 45 is often claimed for commits older than that:
https://github.com/mdn/browser-compat-data/issues/7844

Chrome 43 was confirmed by testing 42 and 43 with this test:
http://mdn-bcd-collector.appspot.com/tests/api/RTCIceCandidate/toJSON

Chrome 43 is also what commit date + branch point dates suggests:
https://source.chromium.org/chromium/chromium/src/+/4a6ce1a6ad82c9b9f16bcb136303acadf08422ea
https://www.chromium.org/developers/calendar
mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data