Add name/offset constructors for default parameter elements.

pkg/analyzer/lib/src/dart/element/builder.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 analyzer.src.dart.element.builder;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
@@ skipping 532 matching lines @@
     return super.visitDeclaredIdentifier(node);
   }
 
   @override
   Object visitDefaultFormalParameter(DefaultFormalParameter node) {
     ElementHolder holder = new ElementHolder();
     NormalFormalParameter normalParameter = node.parameter;
     SimpleIdentifier parameterName = normalParameter.identifier;
     ParameterElementImpl parameter;
     if (normalParameter is FieldFormalParameter) {
-      parameter = new DefaultFieldFormalParameterElementImpl(parameterName);
+      parameter =
+          new DefaultFieldFormalParameterElementImpl.forNode(parameterName);
       FieldElement field =
           _fieldMap == null ? null : _fieldMap[parameterName.name];
       if (field != null) {
         (parameter as DefaultFieldFormalParameterElementImpl).field = field;
       }
     } else {
-      parameter = new DefaultParameterElementImpl(parameterName);
+      parameter = new DefaultParameterElementImpl.forNode(parameterName);
     }
     parameter.const3 = node.isConst;
     parameter.final2 = node.isFinal;
     parameter.parameterKind = node.kind;
     // set initializer, default value range
     Expression defaultValue = node.defaultValue;
     if (defaultValue != null) {
       _visit(holder, defaultValue);
       FunctionElementImpl initializer =
           new FunctionElementImpl.forOffset(defaultValue.beginToken.offset);
@@ skipping 55 matching lines @@
     return null;
   }
 
   @override
   Object visitFieldFormalParameter(FieldFormalParameter node) {
     if (node.parent is! DefaultFormalParameter) {
       SimpleIdentifier parameterName = node.identifier;
       FieldElement field =
           _fieldMap == null ? null : _fieldMap[parameterName.name];
       FieldFormalParameterElementImpl parameter =
-          new FieldFormalParameterElementImpl(parameterName);
+          new FieldFormalParameterElementImpl.forNode(parameterName);
       parameter.const3 = node.isConst;
       parameter.final2 = node.isFinal;
       parameter.parameterKind = node.kind;
       if (field != null) {
         parameter.field = field;
       }
       _currentHolder.addParameter(parameter);
       parameterName.staticElement = parameter;
     }
     //
@@ skipping 807 matching lines @@
     return null;
   }
 
   /**
    * Return the lexical identifiers associated with the given [identifiers].
    */
   static List<String> _getIdentifiers(NodeList<SimpleIdentifier> identifiers) {
     return identifiers.map((identifier) => identifier.name).toList();
   }
 }