Changes required for ECMA standardization, plus allow void in getter return type.

R=ahe@google.com, lrn@google.com

Review URL: https://codereview.chromium.org//206743002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@34201 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed