Initial re-write of analysis context for the new task model

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 'dart:math' as math;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisTask;
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/error_verifier.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/parser.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/task/driver.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
  * The errors produced while resolving a library directives.
  *
  * The list will be empty if there were no errors, but will not be `null`.
  *
@@ skipping 1497 matching lines @@
   void internalPerform() {
     LibraryElement coreLibrary = getRequiredInput(CORE_INPUT);
     LibraryElement asyncLibrary = getRequiredInput(ASYNC_INPUT);
     Namespace coreNamespace = coreLibrary.publicNamespace;
     Namespace asyncNamespace = asyncLibrary.publicNamespace;
     //
     // Record outputs.
     //
     TypeProvider typeProvider =
         new TypeProviderImpl.forNamespaces(coreNamespace, asyncNamespace);
-    (context as ExtendedAnalysisContext).typeProvider = typeProvider;
+    (context as InternalAnalysisContext).typeProvider = typeProvider;
     outputs[TYPE_PROVIDER] = typeProvider;
   }
 
   static Map<String, TaskInput> buildInputs(AnalysisContextTarget target) {
     SourceFactory sourceFactory = target.context.sourceFactory;
     Source coreSource = sourceFactory.forUri(DartSdk.DART_CORE);
     Source asyncSource = sourceFactory.forUri(DartSdk.DART_ASYNC);
     return <String, TaskInput>{
       CORE_INPUT: LIBRARY_ELEMENT3.of(coreSource),
       ASYNC_INPUT: LIBRARY_ELEMENT3.of(asyncSource)
@@ skipping 1028 matching lines @@
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.first;
     _newSources.remove(currentTarget);
     return true;
   }
 }