Use ResourceProvider instead of specialized setRealRoot/setFakeRoot.

pkg/analyzer2dart/lib/src/driver.dart

 // Copyright (c) 2014, 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.
 
 library analyzer2dart.driver;
 
+import 'package:analyzer/file_system/file_system.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';
 import 'package:analyzer/src/generated/source_io.dart';
 
 import 'closed_world.dart';
 import 'tree_shaker.dart';
 
 /**
  * Top level driver for Analyzer2Dart.
  */
 class Driver {
-  AnalysisContext context;
+  final ResourceProvider resourceProvider;
+  final AnalysisContext context;
 
-  Driver(DartSdk sdk) : context = AnalysisEngine.instance.createAnalysisContext() {
+  Driver(this.resourceProvider, DartSdk sdk)
+      : context = AnalysisEngine.instance.createAnalysisContext() {
     // Set up the source factory.
     // TODO(paulberry): do we want to use ExplicitPackageUriResolver?
     List<UriResolver> uriResolvers = [
         new FileUriResolver(),
         new DartUriResolver(sdk) /* ,
         new PackageUriResolver(packagesDirectories) */
     ];
     context.sourceFactory = new SourceFactory(uriResolvers);
   }
 
@@ skipping 18 matching lines @@
     if (entryPointElement == null) {
       throw new Exception('No main()!');
     }
     return entryPointElement;
   }
 
   /**
    * Add the given file as the root of analysis, and return the corresponding
    * source.
    */
-  Source setRealRoot(String path) {
-    // Tell the analysis server about the root
+  Source setRoot(String path) {
+    File file = resourceProvider.getResource(path);
+    Source source = file.createSource();
+    // add the Source
     ChangeSet changeSet = new ChangeSet();
-    JavaFile javaFile = new JavaFile(path);
-    Source source = new FileBasedSource.con1(javaFile);
     changeSet.addedSource(source);
     context.applyChanges(changeSet);
-    return source;
-  }
-
-  /**
-   * Add the given file contents as the root of analysis.  For unit testing.
-   */
-  Source setFakeRoot(String contents) {
-    String path = 'root.dart';
-    // Tell the analysis server about the root
-    ChangeSet changeSet = new ChangeSet();
-    JavaFile javaFile = new JavaFile(path);
-    Source source = new FileBasedSource.con1(javaFile);
-    changeSet.addedSource(source);
-    changeSet.changedContent(source, contents);
-    context.applyChanges(changeSet);
+    // return the Source
     return source;
   }
 }
-