Fire a signal when the transport channel state changes

webrtc/p2p/base/transportchannelimpl.h

Index: webrtc/p2p/base/transportchannelimpl.h
diff --git a/webrtc/p2p/base/transportchannelimpl.h b/webrtc/p2p/base/transportchannelimpl.h
index f548aa012f80a3463ecf737ef55d4bffd7d14b0d..70cb4e292f615fbba1d91316139c1649a6d9574f 100644
--- a/webrtc/p2p/base/transportchannelimpl.h
+++ b/webrtc/p2p/base/transportchannelimpl.h
@@ -100,9 +100,8 @@ class TransportChannelImpl : public TransportChannel {
   // agents.
   sigslot::signal1<TransportChannelImpl*> SignalRoleConflict;
 
-  // Emitted whenever the number of connections available to the transport
-  // channel decreases.
-  sigslot::signal1<TransportChannelImpl*> SignalConnectionRemoved;
+  // Emitted whenever the transport channel state changed.
+  sigslot::signal1<TransportChannelImpl*> SignalStateChanged;
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(TransportChannelImpl);