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

pkg/dart2js_incremental/lib/caching_compiler.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.
 
 part of dart2js_incremental;
 
 /// Do not call this method directly. It will be made private.
 // TODO(ahe): Make this method private.
 Future<CompilerImpl> reuseCompiler(
     {CompilerDiagnostics diagnosticHandler,
      CompilerInput inputProvider,
      CompilerOutput outputProvider,
      List<String> options: const [],
      CompilerImpl cachedCompiler,
      Uri libraryRoot,
      Uri packageRoot,
+     Uri packageConfig,
      bool packagesAreImmutable: false,
      Map<String, dynamic> environment,
      Future<bool> reuseLibrary(LibraryElement library)}) {
   UserTag oldTag = new UserTag('_reuseCompiler').makeCurrent();
   if (libraryRoot == null) {
     throw 'Missing libraryRoot';
   }
   if (inputProvider == null) {
     throw 'Missing inputProvider';
   }
@@ skipping 26 matching lines @@
       }
     }
     oldTag.makeCurrent();
     compiler = new CompilerImpl(
         inputProvider,
         outputProvider,
         diagnosticHandler,
         new CompilerOptions.parse(
             libraryRoot: libraryRoot,
             packageRoot: packageRoot,
+            packageConfig: packageConfig,
             options: options,
             environment: environment));
     JavaScriptBackend backend = compiler.backend;
 
     full.Emitter emitter = backend.emitter.emitter;
 
     // Much like a scout, an incremental compiler is always prepared. For
     // mixins, classes, and lazy statics, at least.
     emitter
         ..needsClassSupport = true
@@ skipping 114 matching lines @@
   final Map<String, String> output = new Map<String, String>();
 
   EventSink<String> createEventSink(String name, String extension) {
     return new StringEventSink((String data) {
       output['$name.$extension'] = data;
     });
   }
 
   String operator[] (String key) => output[key];
 }