Support enabling of type inference with useKernel

tests/compiler/dart2js/equivalence/id_equivalence_helper.dart

 // Copyright (c) 2017, 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 'dart:async';
 import 'dart:io';
 
-import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/common.dart';
 import 'package:compiler/src/common_elements.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/elements/entities.dart';
 import 'package:expect/expect.dart';
 
 import '../annotated_code_helper.dart';
 import '../memory_compiler.dart';
 import '../equivalence/id_equivalence.dart';
 import '../kernel/compiler_helper.dart';
@@ skipping 19 matching lines @@
   await compiler.run(mainUri);
   return compiler;
 }
 
 /// Compile [code] from .dill sources.
 Future<Compiler> compileFromDill(
     AnnotatedCode code, Uri mainUri, List<String> options) async {
   Compiler compiler = await compileWithDill(
       entryPoint: mainUri,
       memorySourceFiles: {'main.dart': code.sourceCode},
-      options: [Flags.disableTypeInference]..addAll(options),
+      options: options,
       beforeRun: (Compiler compiler) {
         compiler.stopAfterTypeInference = true;
       });
   return compiler;
 }
 
 /// Compute expected and actual data for all members defined in [annotatedCode].
 ///
 /// Actual data is computed using [computeMemberData] and [code] is compiled
 /// using [compileFunction].
@@ skipping 106 matching lines @@
     });
     return withAnnotations(annotations);
   }
 }
 
 /// Check code for all test files int [data] using [computeFromAst] and
 /// [computeFromKernel] from the respective front ends. If [skipForKernel]
 /// contains the name of the test file it isn't tested for kernel.
 Future checkTests(Directory dataDir, ComputeMemberDataFunction computeFromAst,
     ComputeMemberDataFunction computeFromKernel,
-    {List<String> skipForKernel: const <String>[], bool verbose: false}) async {
+    {List<String> skipForKernel: const <String>[],
+    List<String> options: const <String>[],
+    bool verbose: false}) async {
   await for (FileSystemEntity entity in dataDir.list()) {
     print('----------------------------------------------------------------');
     print('Checking ${entity.uri}');
     print('----------------------------------------------------------------');
     String annotatedCode = await new File.fromUri(entity.uri).readAsString();
     print('--from ast------------------------------------------------------');
     await checkCode(annotatedCode, computeFromAst, compileFromSource,
-        verbose: verbose);
+        options: options, verbose: verbose);
     if (skipForKernel.contains(entity.uri.pathSegments.last)) {
       print('--skipped for kernel------------------------------------------');
       continue;
     }
     print('--from kernel---------------------------------------------------');
     await checkCode(annotatedCode, computeFromKernel, compileFromDill,
-        verbose: verbose);
+        options: options, verbose: verbose);
   }
 }
 
 /// Compiles the [annotatedCode] with the provided [options] and calls
 /// [computeMemberData] for each member. The result is checked against the
 /// expected data derived from [annotatedCode].
 Future checkCode(
     String annotatedCode,
     ComputeMemberDataFunction computeMemberData,
     CompileFunction compileFunction,
@@ skipping 74 matching lines @@
       id = new NodeId(annotation.offset);
       expected = text;
     } else {
       id = new ElementId(text.substring(0, colonPos));
       expected = text.substring(colonPos + 1);
     }
     map[id] = expected;
   }
   return map;
 }