dart2dart: Introduce Renamer that is used by renaming unparser

lib/compiler/implementation/dart_backend/backend.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class BailoutException {
   final String reason;
 
   const BailoutException(this.reason);
 }
 
@@ skipping 44 matching lines @@
     void bailout(String reason) {
       throw new BailoutException(reason);
     }
 
     /**
      * Tells whether we should output given element. Corelib classes like
      * Object should not be in the resulting code.
      */
     bool shouldOutput(Element element) {
       return element.kind !== ElementKind.VOID
+          && element is! AbstractFieldElement

[Anton Muhin, 2012/07/23 11:23:10]

why?

[Roman, 2012/07/23 15:34:15]

I don't remember! I checked again without this constraint and tests pass,
dart2js and unparser_test unparse fine. Removed.

           && element.getLibrary() !== compiler.coreLibrary;
     }
 
     try {
       Emitter emitter = new Emitter(compiler);
       resolvedElements.forEach((element, treeElements) {
         if (!shouldOutput(element)) return;
         if (element.isMember()) {
           var enclosingClass = element.enclosingElement;
           assert(enclosingClass.isClass());
@@ skipping 15 matching lines @@
       compiler.assembledCode = '''
 main() {
   final bailout_reason = "${e.reason}";
 }
 ''';
     }
   }
 
   log(String message) => compiler.log('[DartBackend] $message');
 }