mojom: Remove braces from module statements and make them come first.

mojo/public/interfaces/application/shell.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+module mojo;
+
 import "mojo/public/interfaces/application/application.mojom";
 import "mojo/public/interfaces/application/service_provider.mojom";
 
-module mojo {
-
 // The Shell is the finder and launcher of Applications. An Application uses
 // it's Shell interface to connect to other Applications.
 [Client=Application]
 interface Shell {
   // Loads url. mojo:{service} will result in the user of the value of the
   // --origin flag to the shell being used.
   ConnectToApplication(string? application_url, ServiceProvider&? provider);
 };
-
-}