Fix missing downwards inference on fields, report more inference

pkg/analyzer/lib/src/generated/resolver.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.generated.resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 6779 matching lines @@
         node.initializer != null) {
       (element as ConstVariableElement).constantInitializer =
           new ConstantAstCloner().cloneNode(node.initializer);
     }
     return null;
   }
 
   @override
   visitVariableDeclarationList(VariableDeclarationList node) {
     for (VariableDeclaration decl in node.variables) {
-      InferenceContext.setType(decl, node.type?.type);
+      InferenceContext.setType(decl, decl.element?.type);
     }
     super.visitVariableDeclarationList(node);
   }
 
   @override
   Object visitWhileStatement(WhileStatement node) {
     // Note: since we don't call the base class, we have to maintain
     // _implicitLabelScope ourselves.
     ImplicitLabelScope outerImplicitScope = _implicitLabelScope;
     try {
@@ skipping 3965 matching lines @@
       return null;
     }
     if (identical(node.staticElement, variable)) {
       if (node.inSetterContext()) {
         result = true;
       }
     }
     return null;
   }
 }