dart2js: fix tests after moving to .packages in the SDK repo

pkg/dart2js_incremental/lib/dart2js_incremental.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 dart2js_incremental;
 
 import 'dart:async' show
     EventSink,
     Future;
 
@@ skipping 36 matching lines @@
 const List<String> INCREMENTAL_OPTIONS = const <String>[
     '--disable-type-inference',
     '--incremental-support',
     '--generate-code-with-compile-time-errors',
     '--no-source-maps', // TODO(ahe): Remove this.
 ];
 
 class IncrementalCompiler {
   final Uri libraryRoot;
   final Uri packageRoot;
+  final Uri packageConfig;
   final CompilerInput inputProvider;
   final CompilerDiagnostics diagnosticHandler;
   final List<String> options;
   final CompilerOutput outputProvider;
   final Map<String, dynamic> environment;
   final List<String> _updates = <String>[];
   final IncrementalCompilerContext _context = new IncrementalCompilerContext();
 
   CompilerImpl _compiler;
 
   IncrementalCompiler({
       this.libraryRoot,
       this.packageRoot,
+      this.packageConfig,
       this.inputProvider,
       this.diagnosticHandler,
       this.options,
       this.outputProvider,
       this.environment}) {
     if (libraryRoot == null) {
       throw new ArgumentError('libraryRoot is null.');
     }
     if (inputProvider == null) {
       throw new ArgumentError('inputProvider is null.');
@@ skipping 20 matching lines @@
 
   Future<CompilerImpl> _reuseCompiler(
       Future<bool> reuseLibrary(LibraryElement library)) {
     List<String> options = this.options == null
         ? <String> [] : new List<String>.from(this.options);
     options.addAll(INCREMENTAL_OPTIONS);
     return reuseCompiler(
         cachedCompiler: _compiler,
         libraryRoot: libraryRoot,
         packageRoot: packageRoot,
+        packageConfig: packageConfig,
         inputProvider: inputProvider,
         diagnosticHandler: diagnosticHandler,
         options: options,
         outputProvider: outputProvider,
         environment: environment,
         reuseLibrary: reuseLibrary);
   }
 
   Future<String> compileUpdates(
       Map<Uri, Uri> updatedFiles,
@@ skipping 44 matching lines @@
   }
 }
 
 class IncrementalCompilationFailed {
   final String reason;
 
   const IncrementalCompilationFailed(this.reason);
 
   String toString() => "Can't incrementally compile program.\n\n$reason";
 }