Get astBuilder and typeInferenceEngine from SourceLoader.

pkg/front_end/lib/src/fasta/source/source_loader.dart

 // Copyright (c) 2016, 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 fasta.source_loader;
 
 import 'dart:async' show Future;
 
 import 'dart:typed_data' show Uint8List;
 
@@ skipping 373 matching lines @@
   }
 
   /// Performs the first phase of top level initializer inference, which
   /// consists of creating kernel objects for all fields and top level variables
   /// that might be subject to type inference, and records dependencies between
   /// them.
   void prepareInitializerInference() {
     typeInferenceEngine.prepareTopLevel(coreTypes, hierarchy);
     builders.forEach((Uri uri, LibraryBuilder library) {
       if (library is SourceLibraryBuilder) {
-        library.prepareInitializerInference(typeInferenceEngine, library, null);
+        library.prepareInitializerInference(library, null);
       }
     });
     ticker.logMs("Prepared initializer inference");
   }
 
   /// Performs the second phase of top level initializer inference, which is to
   /// visit fields and top level variables in topologically-sorted order and
   /// assign their types.
   void performInitializerInference() {
     typeInferenceEngine.finishTopLevel();
     ticker.logMs("Performed initializer inference");
   }
 
   List<Uri> getDependencies() => sourceBytes.keys.toList();
 }