Split up TypeInferrer class.

pkg/front_end/lib/src/fasta/builder/builder.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.builder;
 
 import '../errors.dart' show internalError;
 
 export 'class_builder.dart' show ClassBuilder;
 
@@ skipping 43 matching lines @@
 
 export 'void_type_builder.dart' show VoidTypeBuilder;
 
 export 'function_type_builder.dart' show FunctionTypeBuilder;
 
 import 'library_builder.dart' show LibraryBuilder;
 
 import 'package:front_end/src/fasta/builder/class_builder.dart'
     show ClassBuilder;
 
-import 'package:front_end/src/fasta/type_inference/type_inferrer.dart'
-    show TypeInferrer;
+import 'package:front_end/src/fasta/type_inference/type_inference_engine.dart'
+    show TypeInferenceEngine;
 
 abstract class Builder {
   /// Used when multiple things with the same name are declared within the same
   /// parent. Only used for declarations, not for scopes.
   ///
   // TODO(ahe): Move to member builder or something. Then we can make
   // this a const class.
   Builder next;
 
   /// The values of [parent], [charOffset], and [fileUri] aren't stored. We
@@ skipping 56 matching lines @@
 
   Uri computeLibraryUri() {
     Builder builder = this;
     do {
       if (builder is LibraryBuilder) return builder.uri;
       builder = builder.parent;
     } while (builder != null);
     return internalError("No library parent.");
   }
 
-  void prepareInitializerInference(TypeInferrer typeInferrer,
+  void prepareInitializerInference(TypeInferenceEngine typeInferenceEngine,
       LibraryBuilder library, ClassBuilder currentClass) {}
 }