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

mojo/public/interfaces/bindings/tests/sample_factory.mojom

 // Copyright 2013 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.
 
+[JavaPackage="org.chromium.mojo.bindings.test.mojom.sample"]
+module sample;
+
 import "sample_import.mojom";
 
-[JavaPackage="org.chromium.mojo.bindings.test.mojom.sample"]
-module sample {
-
 // This sample shows how handles to MessagePipes can be sent as both parameters
 // to methods as well as fields on structs.
 
 struct Request {
   int32 x;
   handle<message_pipe>? pipe;
   array<handle<message_pipe>>? more_pipes;
 
   // Interfaces can be used as members.
   imported.ImportedInterface? obj;
@@ skipping 17 matching lines @@
   RequestImportedInterface(
       imported.ImportedInterface& obj) => (imported.ImportedInterface& obj);
   TakeImportedInterface(
       imported.ImportedInterface obj) => (imported.ImportedInterface obj);
 };
 
 interface FactoryClient {
   DidStuff(Response response, string text);
   DidStuff2(string text);
 };
-
-}  // module sample