Clean up many generated constructors

pkg/analyzer/example/resolver_driver.dart

 #!/usr/bin/env dart
 // Copyright (c) 2013, 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.
 
 import 'dart:io';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
 import 'package:analyzer/src/generated/sdk_io.dart' show DirectoryBasedDartSdk;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 
-const _usage =
-    'Usage: resolve_driver <path_to_sdk> <file_to_resolve> [<packages_root>]';
-
 void main(List<String> args) {
   print('working dir ${new File('.').resolveSymbolicLinksSync()}');
 
   if (args.length < 2 || args.length > 3) {
     print(_usage);
     exit(0);
   }
 
   String packageRoot;
   if (args.length == 3) {
     packageRoot = args[2];
   }
 
   JavaSystemIO.setProperty("com.google.dart.sdk", args[0]);
   DartSdk sdk = DirectoryBasedDartSdk.defaultSdk;
 
   var resolvers = [new DartUriResolver(sdk), new FileUriResolver()];
 
   if (packageRoot != null) {
     var packageDirectory = new JavaFile(packageRoot);
     resolvers.add(new PackageUriResolver([packageDirectory]));
   }
 
   AnalysisContext context = AnalysisEngine.instance.createAnalysisContext()
     ..sourceFactory = new SourceFactory(resolvers);
 
-  Source source = new FileBasedSource.con1(new JavaFile(args[1]));
+  Source source = new FileBasedSource(new JavaFile(args[1]));
   ChangeSet changeSet = new ChangeSet()..addedSource(source);
   context.applyChanges(changeSet);
   LibraryElement libElement = context.computeLibraryElement(source);
   print("libElement: $libElement");
 
   CompilationUnit resolvedUnit =
       context.resolveCompilationUnit(source, libElement);
   var visitor = new _ASTVisitor();
   resolvedUnit.accept(visitor);
 }
 
+const _usage =
+    'Usage: resolve_driver <path_to_sdk> <file_to_resolve> [<packages_root>]';
+
 class _ASTVisitor extends GeneralizingAstVisitor {
   visitNode(AstNode node) {
     var lines = <String>['${node.runtimeType} : <"$node">'];
     if (node is SimpleIdentifier) {
       Element element = node.staticElement;
       if (element != null) {
         lines.add('  element: ${element.runtimeType}');
         LibraryElement library = element.library;
         if (library != null) {
           var fullName =
               element.library.definingCompilationUnit.source.fullName;
           lines.add("  from $fullName");
         }
       }
     }
     print(lines.join('\n'));
     return super.visitNode(node);
   }
 }