Add methods to set the ICE connection receiving_timeout values.

webrtc/p2p/base/p2ptransportchannel.cc

Index: webrtc/p2p/base/p2ptransportchannel.cc
diff --git a/webrtc/p2p/base/p2ptransportchannel.cc b/webrtc/p2p/base/p2ptransportchannel.cc
index 1484d17158545bb90fd6e0cee82fda43c5ed7ad2..46ed40ad76f9ced65929339594e5757ae435bb32 100644
--- a/webrtc/p2p/base/p2ptransportchannel.cc
+++ b/webrtc/p2p/base/p2ptransportchannel.cc
@@ -359,10 +359,15 @@ void P2PTransportChannel::SetRemoteIceMode(IceMode mode) {
   remote_ice_mode_ = mode;
 }
 
-void P2PTransportChannel::set_receiving_timeout(int receiving_timeout_ms) {
+void P2PTransportChannel::SetReceivingTimeout(int receiving_timeout_ms) {
+  if (receiving_timeout_ms < 0) {
+    return;

[pthatcher1, 2015/07/11 00:24:53]

At least log a warning.

[honghaiz3, 2015/08/05 23:57:39]

This also happens in the default case where users have not set the receiving
timeout. 
So better not log anything. 

+  }
   receiving_timeout_ = receiving_timeout_ms;
   check_receiving_delay_ =
       std::max(MIN_CHECK_RECEIVING_DELAY, receiving_timeout_ / 10);
+  LOG(LS_VERBOSE) << "Set ICE receiving timeout to " << receiving_timeout_
+                  << " milliseconds";
 }
 
 // Go into the state of processing candidates, and running in general