392db8d312
When converting null to a boolean value, throw an AssertionError rather than a TypeError. This is the same change as r42145, with added co19 status updates. R=srdjan@google.com Review URL: https://codereview.chromium.org//779253003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@42170 260f80e4-7a28-3924-810f-c04153c831b5