Handle signature types and fields in kernel_impact

pkg/compiler/lib/src/ssa/kernel_ast_adapter.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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../common.dart';
 import '../compiler.dart';
 import '../constants/values.dart';
 import '../dart_types.dart';
@@ skipping 17 matching lines @@
   final Map<ir.Node, ast.Node> _nodeToAst;
   final Map<ir.Node, Element> _nodeToElement;
   DartTypeConverter _typeConverter;
 
   KernelAstAdapter(
       this._backend,
       this._resolvedAst,
       this._nodeToAst,
       this._nodeToElement,
       Map<FunctionElement, ir.Member> functions,
+      Map<FieldElement, ir.Field> fields,
       Map<ClassElement, ir.Class> classes,
       Map<LibraryElement, ir.Library> libraries) {
     for (FunctionElement functionElement in functions.keys) {
       _nodeToElement[functions[functionElement]] = functionElement;
     }
+    for (FieldElement fieldElement in fields.keys) {
+      _nodeToElement[fields[fieldElement]] = fieldElement;
+    }
     for (ClassElement classElement in classes.keys) {
       _nodeToElement[classes[classElement]] = classElement;
     }
     for (LibraryElement libraryElement in libraries.keys) {
       _nodeToElement[libraries[libraryElement]] = libraryElement;
     }
     _typeConverter = new DartTypeConverter(this);
   }
 
   Compiler get _compiler => _backend.compiler;
@@ skipping 107 matching lines @@
   @override
   DartType visitDynamicType(ir.DynamicType node) {
     return const DynamicType();
   }
 
   @override
   DartType visitInvalidType(ir.InvalidType node) {
     throw new UnimplementedError("Invalid types not currently supported");
   }
 }