Add CoreTypes interface.

BUG=
R=karlklose@google.com

Review URL: https://codereview.chromium.org//804333002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42382 260f80e4-7a28-3924-810f-c04153c831b5
cps-ir: Give up on code generation of static getters and setters.

They are currently encoded as [InvokeStatic]s, but we cannot generate code for them.  We should create separate nodes for them and add type assertions for the elements.

R=sigurdm@google.com

Review URL: https://codereview.chromium.org//811763003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42383 260f80e4-7a28-3924-810f-c04153c831b5