Try to resolve incrementally whole functions, constructors or methods.

So, for example, not-named parameter rename in a function can be incrementally resolved.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//755373003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41977 260f80e4-7a28-3924-810f-c04153c831b5