Bug 1055477 - Part 1. Add CheckPermission. r=smaug

From 3c5b491a6dfeca7cd7e93b596f368f67b40d9632 Mon Sep 17 00:00:00 2001
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 dom/base/Navigator.cpp   | 3 +--
 dom/webidl/MozNFC.webidl | 3 ++-
 2 files changed, 3 insertions(+), 3 deletions(-)
Bug 1055477 - Part 2: Add AvailableIn. r=smaug, ehasn
Bug 1055477 - Part 3: update MozNFCPeerEvent and tests. r=smaug