Mojo: more idiomatic C++ bindings

mojo/public/cpp/shell/lib/application.cc

Index: mojo/public/cpp/shell/lib/application.cc
diff --git a/mojo/public/cpp/shell/lib/application.cc b/mojo/public/cpp/shell/lib/application.cc
index 161e4e0e582bba6d710201677739ccb1f158edde..9e93a679e998f276195a8bcbeba5beab91e9d432 100644
--- a/mojo/public/cpp/shell/lib/application.cc
+++ b/mojo/public/cpp/shell/lib/application.cc
@@ -41,13 +41,13 @@ void Application::RemoveServiceConnector(
     shell_.reset();
 }
 
-void Application::AcceptConnection(const mojo::String& url,
+void Application::AcceptConnection(mojo::String url,
                                    ScopedMessagePipeHandle client_handle) {
   // TODO(davemoore): This method must be overridden by an Application subclass
   // to dispatch to the right ServiceConnector. We need to figure out an
   // approach to registration to make this better.
   assert(1 == service_connectors_.size());
-  return service_connectors_.front()->AcceptConnection(url.To<std::string>(),
+  return service_connectors_.front()->AcceptConnection(url,
                                                        client_handle.Pass());
 }