As proof of concept, it patches a non-functional htmlEscape from web.dart.
Still has lots of restrictions:
- Only loads a normal library (no syntax extension to mark patches as
separate from additions). Assumes every element is a patch.
- Only handles top-level functions (probably won't handle getters/setters
or constructors), and not classes.
- Doesn't check that the patched function is marked external (no syntax for
that in the spec yet, doesn't even require it to be abstract).
- Doesn't check that the signature of the patch function matches the original
function.
- Probably won't work for 'coreimpl', as loaded from 'js_helper', since it's not
loaded using the 'dart:' scheme.
Review URL: https://chromiumcodereview.appspot.com//10689036
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9246 260f80e4-7a28-3924-810f-c04153c831b5
lrn@google.com