Mojo C++ bindings: InterfacePtr<T> and Binding<T> use MultiplexRouter when T passes associated inte…

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

Index: mojo/public/cpp/bindings/lib/multiplex_router.h
diff --git a/mojo/public/cpp/bindings/lib/multiplex_router.h b/mojo/public/cpp/bindings/lib/multiplex_router.h
index fc0d27eaaed90eaba6acca11ee0c6a834c459d90..553ba5cf4d425231c93ea7a7391b0ddb39817505 100644
--- a/mojo/public/cpp/bindings/lib/multiplex_router.h
+++ b/mojo/public/cpp/bindings/lib/multiplex_router.h
@@ -138,6 +138,12 @@ class MultiplexRouter
     return connector_.is_valid();
   }
 
+  // TODO(yzshen): consider removing this getter.
+  MessagePipeHandle handle() const {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    return connector_.handle();
+  }
+
  private:
   friend class base::RefCountedDeleteOnMessageLoop<MultiplexRouter>;
   friend class base::DeleteHelper<MultiplexRouter>;