Adding more detail to MessageQueue::Dispatch logging.

webrtc/libjingle/xmpp/pingtask.cc

Index: webrtc/libjingle/xmpp/pingtask.cc
diff --git a/webrtc/libjingle/xmpp/pingtask.cc b/webrtc/libjingle/xmpp/pingtask.cc
index ad4566a51c3b7814825525bf0c74d6e981b4149e..f7bef11043b688260239e8303e7abf1a705941a5 100644
--- a/webrtc/libjingle/xmpp/pingtask.cc
+++ b/webrtc/libjingle/xmpp/pingtask.cc
@@ -77,8 +77,8 @@ int PingTask::ProcessStart() {
 
     // Wake ourselves up when it's time to send another ping or when the ping
     // times out (so we can fire a signal).
-    message_queue_->PostDelayed(ping_timeout_millis_, this);
-    message_queue_->PostDelayed(ping_period_millis_, this);
+    message_queue_->PostDelayed(RTC_FROM_HERE, ping_timeout_millis_, this);
+    message_queue_->PostDelayed(RTC_FROM_HERE, ping_period_millis_, this);
   }
 
   return STATE_BLOCKED;