Replace _analyzeElementEagerly with Resolution.ensureResolved

tests/compiler/dart2js/analyze_test_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 dart2js.analyze_test.test;
 
 import 'dart:io';
 
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/apiimpl.dart' show
@@ skipping 31 matching lines @@
   "http_launch_data/",
   "mirrors_helper.dart",
   "path%20with%20spaces/",
   "one_line_dart_program.dart",
   "sourcemaps/invokes_test_file.dart",
   "cps_ir/input/",
   // No longer maintained:
   "backend_dart/",
   // Broken tests:
   "http_test.dart",
+  // Package directory
+  "packages/",
 ];
 
 const List<MessageKind> MESSAGE_SKIP_LIST = const <MessageKind>[
   // TODO(johnniwinther): Support checking of this warning. (Issue 26132)
   MessageKind.IMPORT_EXPERIMENTAL_MIRRORS,
 ];
 
 main(List<String> arguments) {
   List<String> options = <String>[];
   for (String argument in arguments) {
@@ skipping 33 matching lines @@
       }
     }
     await analyze(
         uriList,
         WHITE_LIST,
         mode: AnalysisMode.URI,
         options: options,
         skipList: MESSAGE_SKIP_LIST);
   });
 }