Roll back changes that broke the bots (TBR)

pkg/analyzer/tool/task_dependency_graph/generate.dart

Index: pkg/analyzer/tool/task_dependency_graph/generate.dart
diff --git a/pkg/analyzer/tool/task_dependency_graph/generate.dart b/pkg/analyzer/tool/task_dependency_graph/generate.dart
index 3bd07967851f47cdc1d991a47d2f44812a329426..db88145ac3d353fe066e7d83d736a84788f31542 100644
--- a/pkg/analyzer/tool/task_dependency_graph/generate.dart
+++ b/pkg/analyzer/tool/task_dependency_graph/generate.dart
@@ -31,6 +31,7 @@ import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/constant.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.dart';
 import 'package:analyzer/src/generated/source_io.dart';
@@ -160,13 +161,10 @@ ${generateGraphData()}
     } else {
       packageRootPath = path.join(rootDir, 'packages');
     }
-    ContextBuilder builder = new ContextBuilder(resourceProvider, null, null);
+    JavaFile packagesDir = new JavaFile(packageRootPath);
     List<UriResolver> uriResolvers = [
       new DartUriResolver(sdk),
-      new PackageMapUriResolver(
-          resourceProvider,
-          builder
-              .convertPackagesToMap(builder.createPackageMap(packageRootPath))),
+      new PackageUriResolver(<JavaFile>[packagesDir]),
       new ResourceUriResolver(PhysicalResourceProvider.INSTANCE)
     ];
     context.sourceFactory = new SourceFactory(uriResolvers);