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

mojo/public/interfaces/application/application.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/service_provider.mojom";
 
-module mojo {
-
 // Applications vend Services through the ServiceProvider interface. Services
 // implement Interfaces.
 interface Application {
   // Initialize is guaranteed to be called before any AcceptConnection calls.
   Initialize(array<string>? args);
 
   AcceptConnection(string? requestor_url, ServiceProvider? provider);
 };
-
-}