Make more JS files beter match the coding standard.

test/mjsunit/object-get-own-property-names.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 27 matching lines @@
 var obj = { a: function(){}, b: function(){} };
 var propertyNames = Object.getOwnPropertyNames(obj);
 propertyNames.sort();
 assertEquals(2, propertyNames.length);
 assertEquals("a", propertyNames[0]);
 assertEquals("b", propertyNames[1]);
 
 // Check slow case
 var obj = { a: 1, b: 2, c: 3 };
 delete obj.b;
-var propertyNames = Object.getOwnPropertyNames(obj)
+var propertyNames = Object.getOwnPropertyNames(obj);
 propertyNames.sort();
 assertEquals(2, propertyNames.length);
 assertEquals("a", propertyNames[0]);
 assertEquals("c", propertyNames[1]);
 
 // Check that non-enumerable properties are being returned.
 var propertyNames = Object.getOwnPropertyNames([1, 2]);
 propertyNames.sort();
 assertEquals(3, propertyNames.length);
 assertEquals("0", propertyNames[0]);
@@ skipping 38 matching lines @@
 } catch (e) {
   assertTrue(/on non-object/.test(e));
 }
 
 try {
   Object.getOwnPropertyNames(null);
   assertTrue(false);
 } catch (e) {
   assertTrue(/on non-object/.test(e));
 }