dart-lang/async_await — pull request #47 by kmillikin (2014-09-12 14:32:48+00:00)
Title: Wrap the analyzer's AstFactory class.

Provide our own API for constructing AST nodes rather than using the
analyzer's AstFactory from testing/ast_factory.dart. Under the hood
it still uses the analyzer's AstFactory but it should be possible to
provide a direct implementation in terms of the AstNode constructors.