Refactor strong mode to remove duplicate TypeRules

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, 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 analyzer.src.task.dart;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 12 matching lines @@
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/visitors.dart';
 import 'package:analyzer/src/plugin/engine_plugin.dart';
 import 'package:analyzer/src/services/lint.dart';
 import 'package:analyzer/src/task/driver.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/src/task/html.dart';
 import 'package:analyzer/src/task/inputs.dart';
 import 'package:analyzer/src/task/model.dart';
 import 'package:analyzer/src/task/strong/checker.dart';
-import 'package:analyzer/src/task/strong/rules.dart';
 import 'package:analyzer/src/task/strong_mode.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
  * The [ResultCachingPolicy] for ASTs.
  */
 const ResultCachingPolicy AST_CACHING_POLICY =
     const SimpleResultCachingPolicy(8192, 8192);
@@ skipping 4956 matching lines @@
 
   @override
   void internalPerform() {
     RecordingErrorListener errorListener = new RecordingErrorListener();
     //
     // Prepare inputs.
     //
     TypeProvider typeProvider = getRequiredInput(TYPE_PROVIDER_INPUT);
     CompilationUnit unit = getRequiredInput(UNIT_INPUT);
     if (context.analysisOptions.strongMode) {
-      unit.accept(new CodeChecker(new TypeRules(typeProvider), errorListener));
+      unit.accept(new CodeChecker(
+          typeProvider, new StrongTypeSystemImpl(), errorListener));
     }
 
     //
     // Record outputs.
     //
     outputs[STRONG_MODE_ERRORS] = getUniqueErrors(errorListener.errors);
     outputs[RESOLVED_UNIT] = unit;
   }
 
   /**
@@ skipping 245 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }