Handle IQ responses asynchronously.

remoting/jingle_glue/signal_strategy.h

Index: remoting/jingle_glue/signal_strategy.h
diff --git a/remoting/jingle_glue/signal_strategy.h b/remoting/jingle_glue/signal_strategy.h
index 0864cee937111d968586aefb2e7a6247285a1b0a..89712670ae73b4733f2718bf04f686ca44e89a07 100644
--- a/remoting/jingle_glue/signal_strategy.h
+++ b/remoting/jingle_glue/signal_strategy.h
@@ -40,7 +40,9 @@ class SignalStrategy {
     // Called after state of the connection has changed.
     virtual void OnSignalStrategyStateChange(State state) {}
 
-    // Must return true if the stanza was handled, false otherwise.
+    // Must return true if the stanza was handled, false
+    // otherwise. The signal strategy must not be deleted from a
+    // handler of this message.
     virtual bool OnSignalStrategyIncomingStanza(
         const buzz::XmlElement* stanza) { return false; }
   };