Support user generated custom native JS classes.

pkg/js/LICENSE

Index: pkg/js/LICENSE
diff --git a/pkg/analysis_server/LICENSE b/pkg/js/LICENSE
similarity index 95%
copy from pkg/analysis_server/LICENSE
copy to pkg/js/LICENSE
index 5c60afea399d2ab2cb4e701b720f10300f498e90..abbb072f8be8840cdb1315d0c8dfa010355eaade 100644
--- a/pkg/analysis_server/LICENSE
+++ b/pkg/js/LICENSE
@@ -1,8 +1,7 @@
-Copyright 2014, the Dart project authors. All rights reserved.
+Copyright 2012, the Dart 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
@@ -12,7 +11,6 @@ met:
     * Neither the name of Google Inc. nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission.
-
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR