Don't serialize local variables.

pkg/analyzer/lib/src/dart/element/element.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.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 3774 matching lines @@
   void set labels(List<LabelElement> labels) {
     _assertNotResynthesized(serializedExecutable);
     for (LabelElement label in labels) {
       (label as LabelElementImpl).enclosingElement = this;
     }
     this._labels = labels;
   }
 
   @override
   List<LocalVariableElement> get localVariables {
-    if (serializedExecutable != null && _localVariables == null) {
-      List<UnlinkedVariable> unlinkedVariables =
-          serializedExecutable.localVariables;
-      int length = unlinkedVariables.length;
-      if (length != 0) {
-        List<LocalVariableElementImpl> localVariables =
-            new List<LocalVariableElementImpl>(length);
-        for (int i = 0; i < length; i++) {
-          localVariables[i] = new LocalVariableElementImpl.forSerializedFactory(
-              unlinkedVariables[i], this);
-        }
-        _localVariables = localVariables;
-      } else {
-        _localVariables = const <LocalVariableElement>[];
-      }
-    }
     return _localVariables ?? const <LocalVariableElement>[];
   }
 
   /**
    * Set the local variables defined within this executable element to the given
    * [variables].
    */
   void set localVariables(List<LocalVariableElement> variables) {
     _assertNotResynthesized(serializedExecutable);
     for (LocalVariableElement variable in variables) {
@@ skipping 5259 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }