Add the option to disable IPv6 ICE candidates on WiFi

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index 165f2d5a0070c9024ac13a70b8fe28272a89c9c9..09c5e98f1df8d97a4291f5af3d1a843253d3a6e3 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -332,6 +332,12 @@ class PeerConnectionInterface : public rtc::RefCountInterface {
     // experimental
     bool disable_ipv6 = false;
 
+    // If set to true, don't gather IPv6 ICE candidates on WIFI.

[Taylor Brandstetter, 2017/03/05 23:45:30]

nit: Spelled "Wi-Fi" or "WiFi"

[Zhi Huang, 2017/03/06 21:14:19]

Done.

+    // This is only used on specifc devices. Certain phones disable ipv6 when

[Taylor Brandstetter, 2017/03/05 23:45:30]

nit: Instead of "only used", maybe "only intended to be used"? Also, "IPv6".

[Zhi Huang, 2017/03/06 21:14:19]

Done.

+    // the screen is turned off and it would be better to just disable it in
+    // those cases.
+    bool disable_ipv6_on_wifi = false;
+
     // If set to true, use RTP data channels instead of SCTP.
     // TODO(deadbeef): Remove this. We no longer commit to supporting RTP data
     // channels, though some applications are still working on moving off of