Remove other usages of ExecutableElement.localVariables.

pkg/analyzer/test/generated/strong_mode_test.dart

 // Copyright (c) 2016, 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.test.generated.strong_mode_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
@@ skipping 1111 matching lines @@
         }
         test() {
           // downwards inference pushes List<?> and in parameter position this
           // becomes inferred as List<Null>.
           var c = new C((items) {});
         }
         ''');
     CompilationUnit unit = (await computeAnalysisResult(source)).unit;
     assertNoErrors(source);
     verify([source]);
-    DartType cType = AstFinder
-        .getTopLevelFunction(unit, "test")
-        .element
-        .localVariables[0]
-        .type;
+    DartType cType = findLocalVariable(unit, 'c').type;
     Element elementC = AstFinder.getClass(unit, "C").element;
 
     _isInstantiationOf(_hasElement(elementC))([_isDynamic])(cType);
   }
 
   test_inference_error_arguments() async {
     Source source = addSource(r'''
 typedef R F<T, R>(T t);
 
 F<T, T> g<T>(F<T, T> f) => (x) => f(f(x));
@@ skipping 2776 matching lines @@
   var v = x;
   v; // marker
 }
 int x = 3;
 ''';
     CompilationUnit unit = await resolveSource(code);
     assertPropagatedAssignedType(code, unit, typeProvider.intType, null);
     assertTypeOfMarkedExpression(code, unit, typeProvider.intType, null);
   }
 }