RTCIceCandidatePairStats.[state/priority] added, ConnectionInfo updated.

webrtc/stats/rtcstats_objects.cc

Index: webrtc/stats/rtcstats_objects.cc
diff --git a/webrtc/stats/rtcstats_objects.cc b/webrtc/stats/rtcstats_objects.cc
index d4fea4951929f8e945c71f464da380469544cbcd..487df930d6ca5aea140844f6a2168cd5c1ebe7ba 100644
--- a/webrtc/stats/rtcstats_objects.cc
+++ b/webrtc/stats/rtcstats_objects.cc
@@ -19,10 +19,9 @@ const char* RTCDataChannelState::kClosed = "closed";
 
 const char* RTCStatsIceCandidatePairState::kFrozen = "frozen";
 const char* RTCStatsIceCandidatePairState::kWaiting = "waiting";
-const char* RTCStatsIceCandidatePairState::kInProgress = "inprogress";
+const char* RTCStatsIceCandidatePairState::kInProgress = "in-progress";
 const char* RTCStatsIceCandidatePairState::kFailed = "failed";
 const char* RTCStatsIceCandidatePairState::kSucceeded = "succeeded";
-const char* RTCStatsIceCandidatePairState::kCancelled = "cancelled";
 
 // Strings defined in https://tools.ietf.org/html/rfc5245.
 const char* RTCIceCandidateType::kHost = "host";