Change Maps to HashMaps to save in performance, index and generated directories not touched

pkg/analysis_server/lib/src/computer/computer_highlights.dart

 // Copyright (c) 2014, 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 computer.highlights;
 
+import 'dart:collection';
+
 import 'package:analysis_server/src/constants.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 
 
 /**
  * A computer for [HighlightRegion]s in a Dart [CompilationUnit].
  */
 class DartUnitHighlightsComputer {
   final CompilationUnit _unit;
 
-  final List<Map<String, Object>> _regions = <Map<String, Object>>[];
+  final List<HashMap<String, Object>> _regions = <HashMap<String, Object>>[];
 
   DartUnitHighlightsComputer(this._unit);
 
   /**
    * Returns the computed highlight regions, not `null`.
    */
-  List<Map<String, Object>> compute() {
+  List<HashMap<String, Object>> compute() {
     _unit.accept(new _DartUnitHighlightsComputerVisitor(this));
     return _regions;
   }
 
   void _addIdentifierRegion(SimpleIdentifier node) {
     if (_addIdentifierRegion_keyword(node)) {
       return;
     }
     if (_addIdentifierRegion_class(node)) {
       return;
@@ skipping 469 matching lines @@
   static const HighlightType PARAMETER = const HighlightType('PARAMETER');
   static const HighlightType SETTER_DECLARATION = const HighlightType('SETTER_DECLARATION');
   static const HighlightType TOP_LEVEL_VARIABLE = const HighlightType('TOP_LEVEL_VARIABLE');
   static const HighlightType TYPE_NAME_DYNAMIC = const HighlightType('TYPE_NAME_DYNAMIC');
   static const HighlightType TYPE_PARAMETER = const HighlightType('TYPE_PARAMETER');
 
   final String name;
 
   const HighlightType(this.name);
 }