Support --use-kernel in memory_compiler

tests/compiler/dart2js/memory_compiler.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.test.memory_compiler;
 
 import 'dart:async';
 
 import 'package:compiler/compiler.dart' show DiagnosticHandler;
 import 'package:compiler/compiler_new.dart'
     show
         CompilationResult,
         CompilerDiagnostics,
         CompilerOutput,
         Diagnostic,
         PackagesDiscoveryProvider;
+import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/diagnostics/messages.dart' show Message;
 import 'package:compiler/src/elements/entities.dart'
     show LibraryEntity, MemberEntity;
 import 'package:compiler/src/enqueue.dart' show ResolutionEnqueuer;
 import 'package:compiler/src/null_compiler_output.dart' show NullCompilerOutput;
 import 'package:compiler/src/library_loader.dart' show LoadedLibraries;
 import 'package:compiler/src/options.dart' show CompilerOptions;
 
 import 'memory_source_file_helper.dart';
 
@@ skipping 50 matching lines @@
     CompilerDiagnostics diagnosticHandler,
     CompilerOutput outputProvider,
     List<String> options: const <String>[],
     CompilerImpl cachedCompiler,
     bool showDiagnostics: true,
     Uri packageRoot,
     Uri packageConfig,
     PackagesDiscoveryProvider packagesDiscoveryProvider,
     void beforeRun(CompilerImpl compiler)}) async {
   if (entryPoint == null) {
-    if (options.contains('--read-dill')) {
-      entryPoint = Uri.parse('memory:main.dill');
-    } else {
-      entryPoint = Uri.parse('memory:main.dart');
-    }
+    entryPoint = Uri.parse('memory:main.dart');
   }
   CompilerImpl compiler = compilerFor(
       entryPoint: entryPoint,
       resolutionInputs: resolutionInputs,
       memorySourceFiles: memorySourceFiles,
       diagnosticHandler: diagnosticHandler,
       outputProvider: outputProvider,
       options: options,
       cachedCompiler: cachedCompiler,
       showDiagnostics: showDiagnostics,
@@ skipping 13 matching lines @@
     List<Uri> resolutionInputs,
     Map<String, dynamic> memorySourceFiles: const <String, dynamic>{},
     CompilerDiagnostics diagnosticHandler,
     CompilerOutput outputProvider,
     List<String> options: const <String>[],
     CompilerImpl cachedCompiler,
     bool showDiagnostics: true,
     Uri packageRoot,
     Uri packageConfig,
     PackagesDiscoveryProvider packagesDiscoveryProvider}) {
-  Uri libraryRoot = Uri.base.resolve('sdk/');
+  Uri libraryRoot;
+  if (options.contains(Flags.useKernel)) {
+    String buildDir = Platform.isMacOS ? 'xcodebuild' : 'out';
+    String configuration =
+        Platform.environment['DART_CONFIGURATION'] ?? 'ReleaseX64';
+    libraryRoot = Uri.base.resolve('$buildDir/$configuration/dart-sdk/');
+  } else {
+    libraryRoot = Uri.base.resolve('sdk/');
+  }
+
   if (packageRoot == null &&
       packageConfig == null &&
       packagesDiscoveryProvider == null) {
     if (Platform.packageRoot != null) {
       packageRoot = Uri.base.resolve(Platform.packageRoot);
     } else if (Platform.packageConfig != null) {
       packageConfig = Uri.base.resolve(Platform.packageConfig);
     } else {
       // The tests are run with the base directory as the SDK root
       // so just use the .packages file there.
@@ skipping 113 matching lines @@
       handler = (Uri uri, int begin, int end, String message, Diagnostic kind) {
         diagnosticHandler(uri, begin, end, message, kind);
         formattingHandler(uri, begin, end, message, kind);
       };
     }
   } else if (diagnosticHandler == null) {
     handler = (Uri uri, int begin, int end, String message, Diagnostic kind) {};
   }
   return handler;
 }
+
+main() {
+  runCompiler(
+      memorySourceFiles: {'main.dart': 'main() {}'},
+      options: [Flags.useKernel]);
+}