[w3c/browser-payment-api] NotSupportedError in private browsing mode (#448)

Should `PaymentRequest.show()` ever reject the promise with `NotSupportedError` in private browsing mode? My intuition is "no", because that lets the website know more information than the user might want to share in private browsing mode. I propose to reject with `"Request cancelled"` string instead. Let me whether this should be placed in in spec or is an implementation detail.

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Received on Monday, 6 March 2017 20:24:37 UTC