Ping backup connection at a slower rate

talk/app/webrtc/java/src/org/webrtc/PeerConnection.java

Index: talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
diff --git a/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java b/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
index 50023001d724b12b8da0b8d97704bd36020a6895..2ca859c760636470ddadcd6014302a1b220e9bbf 100644
--- a/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
+++ b/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
@@ -151,6 +151,7 @@ public class PeerConnection {
     public int audioJitterBufferMaxPackets;
     public boolean audioJitterBufferFastAccelerate;
     public int iceConnectionReceivingTimeout;
+    public int iceBackupConnectionPingInterval;
     public KeyType keyType;
     public ContinualGatheringPolicy continualGatheringPolicy;
 
@@ -163,6 +164,7 @@ public class PeerConnection {
       audioJitterBufferMaxPackets = 50;
       audioJitterBufferFastAccelerate = false;
       iceConnectionReceivingTimeout = -1;
+      iceBackupConnectionPingInterval = -1;
       keyType = KeyType.ECDSA;
       continualGatheringPolicy = ContinualGatheringPolicy.GATHER_ONCE;
     }