Move LibraryUnitTarget into API.

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/generated/utilities_general.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 1858 matching lines @@
    * Create a [GenerateHintsTask] based on the given [target] in
    * the given [context].
    */
   static GenerateHintsTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new GenerateHintsTask(context, target);
   }
 }
 
 /**
- * A pair of a library [Source] and a unit [Source] in this library.
- */
-class LibraryUnitTarget implements AnalysisTarget {
-  final Source library;
-  final Source unit;
-
-  LibraryUnitTarget(this.library, this.unit);
-
-  @override
-  int get hashCode {
-    return JenkinsSmiHash.combine(library.hashCode, unit.hashCode);
-  }
-
-  @override
-  Source get source => unit;
-
-  @override
-  bool operator ==(other) {
-    return other is LibraryUnitTarget &&
-        other.library == library &&
-        other.unit == unit;
-  }
-}
-
-/**
  * A task that parses the content of a Dart file, producing an AST structure.
  */
 class ParseDartTask extends SourceBasedAnalysisTask {
   /**
    * The name of the input whose value is the line information produced for the
    * file.
    */
   static const String LINE_INFO_INPUT_NAME = 'LINE_INFO_INPUT_NAME';
 
   /**
@@ skipping 670 matching lines @@
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.first;
     _newSources.remove(currentTarget);
     return true;
   }
 }