This is the first step towards improving the Selector as an
abstraction used by the resolver, builder, and enqueur. The
intent is to have the resolver construct selectors that can
be used for method lookup, tree shaking, and for simplifying
the logic we use to build the correct SSA instructions for
sends (some of which are quite complex).
Next step is to get rid of more of the adhoc selector building
that's done outside of the resolver and clean up how we resolve
sends. After that, I'll start removing the need for passing
around both a name and a selector in a lot of places.
R=ahe@google.com,sgjesse@google.com
BUG=
Review URL: https://chromiumcodereview.appspot.com//10825337
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10637 260f80e4-7a28-3924-810f-c04153c831b5
kasperl@google.com
e8268dd78a