Handle built-in function identical correctly

The parser, rather than the backend, recognizes the built-in function identical
and replaces is with the old token for the === operator. This fixes compile
time constant handling of calls to identical.

Review URL: https://codereview.chromium.org//14366007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21753 260f80e4-7a28-3924-810f-c04153c831b5
4 files changed