Make more JS files beter match the coding standard.

test/mjsunit/mirror-error.js

 // Copyright 2008 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 20 matching lines @@
 function MirrorRefCache(json_refs) {
   var tmp = eval('(' + json_refs + ')');
   this.refs_ = [];
   for (var i = 0; i < tmp.length; i++) {
     this.refs_[tmp[i].handle] = tmp[i];
   }
 }
 
 MirrorRefCache.prototype.lookup = function(handle) {
   return this.refs_[handle];
-}
+};
 
 function testErrorMirror(e) {
   // Create mirror and JSON representation.
   var mirror = debug.MakeMirror(e);
   var serializer = debug.MakeMirrorSerializer();
   var json = JSON.stringify(serializer.serializeValue(mirror));
   var refs = new MirrorRefCache(
       JSON.stringify(serializer.serializeReferencedObjects()));
 
   // Check the mirror hierachy.
@@ skipping 33 matching lines @@
 // Test Date values.
 testErrorMirror(new Error());
 testErrorMirror(new Error('This does not work'));
 testErrorMirror(new Error(123+456));
 testErrorMirror(new EvalError('EvalError'));
 testErrorMirror(new RangeError('RangeError'));
 testErrorMirror(new ReferenceError('ReferenceError'));
 testErrorMirror(new SyntaxError('SyntaxError'));
 testErrorMirror(new TypeError('TypeError'));
 testErrorMirror(new URIError('URIError'));