Filed https://github.com/w3c/webrtc-pc/issues/910 which needs to be resolved first.

And https://github.com/w3c/webrtc-pc/pull/912

lunalu@, could you take a look at this as well? It'll be very similar to  issue 658428 . Just a few things to keep in mind. First, the spec has an url attribute on RTCPeerConnectionIceEvent, but it's not in Gecko:
https://github.com/mozilla/gecko-dev/blob/master/dom/webidl/RTCPeerConnectionIceEvent.webidl

Since it can be feature detected when added later, I think it's fine to expose the event without adding url, but it might be worth a few minutes to see if it would be trivial to support.

Second, both the RTCPeerConnectionIceEventInit candidate member and the RTCPeerConnectionIceEvent candidate attribute need to be nullable. The spec change for that has already been made in https://github.com/w3c/webrtc-pc/pull/863 but isn't live at https://w3c.github.io/webrtc-pc/#idl-def-rtcpeerconnectioniceeventinit yet.

Changed label to PeerConnection, since this is more a Blink issue than an ICE protocol issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/581c687738c58a871ba5310211d8307244bf07b6

commit 581c687738c58a871ba5310211d8307244bf07b6
Author: lunalu <lunalu@chromium.org>
Date: Wed Nov 16 18:27:47 2016

Rename RTCIceCandidateEvent to RTCPeerConnectionIceEvent and expose.

Intent to Ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/iMEnDLH_oJk/h2ZB9Sv8AQAJ

Note:
1. The url attribute on RTCPeerConnectionIceEvent is not added (it is
not currently in Gecko).
2. The candidate member of RTCIceCandidateEvent and RTCIceCandidateEventInit is
made nullable.
Specs:
https://w3c.github.io/webrtc-pc/#idl-def-rtcicecandidateeventinit

BUG= 659286 

Review-Url: https://codereview.chromium.org/2494553002
Cr-Commit-Position: refs/heads/master@{#432565}

[add] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/LayoutTests/fast/peerconnection/RTCPeerConnectionIceEvent-constructor.html
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/LayoutTests/platform/linux/virtual/stable/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/LayoutTests/platform/win/virtual/stable/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/bindings/modules/BUILD.gn
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/modules_idl_files.gni
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/BUILD.gn
[delete] https://crrev.com/a877ad3e0cc023956bd38fcf9018b028ba35f15e/third_party/WebKit/Source/modules/peerconnection/RTCIceCandidateEvent.cpp
[modify] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp
[add] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnectionIceEvent.cpp
[rename] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnectionIceEvent.h
[rename] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnectionIceEvent.idl
[add] https://crrev.com/581c687738c58a871ba5310211d8307244bf07b6/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnectionIceEventInit.idl