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

mojo/apps/js/test/js_to_cpp.mojom

Index: mojo/apps/js/test/js_to_cpp.mojom
diff --git a/mojo/apps/js/test/js_to_cpp.mojom b/mojo/apps/js/test/js_to_cpp.mojom
index 9914e9bb92802c6d1f4669c105b596ecfe265e2b..69f67b69179e0e96b5bb7b2c2880825b31f3a5c7 100644
--- a/mojo/apps/js/test/js_to_cpp.mojom
+++ b/mojo/apps/js/test/js_to_cpp.mojom
@@ -1,4 +1,4 @@
-module js_to_cpp {
+module js_to_cpp;
 
 // This struct encompasses all of the basic types, so that they
 // may be sent from C++ to JS and back for validation.
@@ -51,5 +51,3 @@ interface JsSide {
   BitFlip(EchoArgs arg);
   BackPointer(EchoArgs arg);
 };
-
-}