Mojo: Fix Router::HandleIncomingMessage().

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

Index: mojo/public/cpp/bindings/lib/router.cc
diff --git a/mojo/public/cpp/bindings/lib/router.cc b/mojo/public/cpp/bindings/lib/router.cc
index 31676bd76f78cc2260b92f2af4c3cc3b354a4276..ec68bba9459bf2b73754a9ee1ec648022ebb1227 100644
--- a/mojo/public/cpp/bindings/lib/router.cc
+++ b/mojo/public/cpp/bindings/lib/router.cc
@@ -125,8 +125,9 @@ bool Router::HandleIncomingMessage(Message* message) {
     }
     MessageReceiver* responder = it->second;
     responders_.erase(it);
-    responder->Accept(message);
+    bool ok = responder->Accept(message);
     delete responder;
+    return ok;
   } else {
     if (incoming_receiver_)
       return incoming_receiver_->Accept(message);