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 f235370b67915137d345c649f38b122e5eefa4b6..5f037a188d2df42c2a6a3846402dffcbc12f1ce5 100644
--- a/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
+++ b/talk/app/webrtc/java/src/org/webrtc/PeerConnection.java
@@ -150,6 +150,7 @@ public class PeerConnection {
     public int audioJitterBufferMaxPackets;
     public boolean audioJitterBufferFastAccelerate;
     public int iceConnectionReceivingTimeout;
+    public int iceBackupCandidatePairPingInterval;
     public KeyType keyType;
     public ContinualGatheringPolicy continualGatheringPolicy;
 
@@ -162,6 +163,7 @@ public class PeerConnection {
       audioJitterBufferMaxPackets = 50;
       audioJitterBufferFastAccelerate = false;
       iceConnectionReceivingTimeout = -1;
+      iceBackupCandidatePairPingInterval = -1;
       keyType = KeyType.ECDSA;
       continualGatheringPolicy = ContinualGatheringPolicy.GATHER_ONCE;
     }