Version 1.5.0-dev.4.21

Partially merge revision 37172 by merging:
https://codereview.chromium.org/353473002

R=kasperl@google.com

Review URL: https://codereview.chromium.org//345373003

git-svn-id: http://dart.googlecode.com/svn/trunk@37583 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed