Mojo C++ bindings: fix Pause/Resume for MultiplexRouter.

mojo/public/cpp/bindings/lib/router.h

Index: mojo/public/cpp/bindings/lib/router.h
diff --git a/mojo/public/cpp/bindings/lib/router.h b/mojo/public/cpp/bindings/lib/router.h
index 6dbe08d5b20eac117984a794cb102dc9a93f3fad..d0c5dad0c38955d2b77eaf7c28bc67b06763bf76 100644
--- a/mojo/public/cpp/bindings/lib/router.h
+++ b/mojo/public/cpp/bindings/lib/router.h
@@ -89,6 +89,8 @@ class Router : public MessageReceiverWithResponder {
   }
 
   // See Binding for details of pause/resume.
+  // Note: This doesn't strictly pause incoming calls. If there are
+  // queued messages, they may be dispatched during pause.
   void PauseIncomingMethodCallProcessing() {
     DCHECK(thread_checker_.CalledOnValidThread());
     connector_.PauseIncomingMethodCallProcessing();