Make RefactoringStatus a collection of generated RefactoringProblems.

pkg/analysis_server/lib/src/services/refactoring/extract_local.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 services.src.refactoring.extract_local;
 
 import 'dart:async';
 
-import 'package:analysis_server/src/protocol2.dart' show SourceEdit;
+import 'package:analysis_server/src/protocol2.dart' show Location, SourceEdit;
 import 'package:analysis_server/src/services/correction/change.dart';
 import 'package:analysis_server/src/services/correction/name_suggestion.dart';
 import 'package:analysis_server/src/services/correction/selection_analyzer.dart';
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/correction/strings.dart';
 import 'package:analysis_server/src/services/correction/util.dart';
 import 'package:analysis_server/src/services/refactoring/naming_conventions.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring_internal.dart';
@@ skipping 356 matching lines @@
     _invalidSelection(message, null);
   }
 
   @override
   Object visitAssignmentExpression(AssignmentExpression node) {
     super.visitAssignmentExpression(node);
     Expression lhs = node.leftHandSide;
     if (_isFirstSelectedNode(lhs)) {
       _invalidSelection(
           'Cannot extract the left-hand side of an assignment.',
-          new RefactoringStatusContext.forNode(lhs));
+          createLocation_forNode(lhs));
     }
     return null;
   }
 
   @override
   Object visitSimpleIdentifier(SimpleIdentifier node) {
     super.visitSimpleIdentifier(node);
     if (_isFirstSelectedNode(node)) {
       // name of declaration
       if (node.inDeclarationContext()) {
@@ skipping 10 matching lines @@
         invalidSelection('Cannot extract name part of a property access.');
       }
       if (parent is PropertyAccess && identical(parent.propertyName, node)) {
         invalidSelection('Cannot extract name part of a property access.');
       }
     }
     return null;
   }
 
   /**
-   * Records fatal error with given message and [RefactoringStatusContext].
+   * Records fatal error with given message and [Locatiom].
    */
-  void _invalidSelection(String message, RefactoringStatusContext context) {
-    status.addFatalError(message, context);
+  void _invalidSelection(String message, Location location) {
+    status.addFatalError(message, location);
     reset();
   }
 
   bool _isFirstSelectedNode(AstNode node) => node == firstSelectedNode;
 }
 
 
 class _HasStatementVisitor extends GeneralizingAstVisitor {
   final List<bool> result;
 
@@ skipping 98 matching lines @@
       Token startToken = nodeTokens[startTokenIndex];
       Token endToken = nodeTokens[endTokenIndex];
       // add occurrence range
       int occuStart = nodeOffset + startToken.offset;
       int occuEnd = nodeOffset + endToken.end;
       SourceRange occuRange = rangeStartEnd(occuStart, occuEnd);
       _addOccurrence(occuRange);
     }
   }
 }