Add support for converted closures with explicit contexts to VM

pkg/kernel/test/closures/suite.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.md file.
 
 library test.kernel.closures.suite;
 
+import 'dart:io' show File;
+
 import 'dart:async' show Future;
 
 import 'package:kernel/core_types.dart' show CoreTypes;
 
 import 'package:testing/testing.dart'
-    show Chain, ChainContext, Result, Step, runMe;
+    show Chain, ChainContext, Result, Step, runMe, StdioProcess;
 
 import 'package:kernel/ast.dart' show Program, Library;
 
 import 'package:kernel/target/targets.dart' show Target;
 
-import 'package:kernel/transformations/closure_conversion.dart'
-    as closure_conversion;
-
 import 'package:front_end/src/fasta/testing/kernel_chain.dart'
     show
         Print,
         MatchExpectation,
         WriteDill,
         ReadDill,
         Verify,
         Compile,
         CompileContext;
 
+import 'package:kernel/transformations/closure_conversion.dart'
+    as closure_conversion;
+
+import 'package:front_end/src/fasta/testing/patched_sdk_location.dart'
+    show computePatchedSdk, computeDartVm;
+
 const String STRONG_MODE = " strong mode ";
 
 class ClosureConversionContext extends ChainContext implements CompileContext {
   final bool strongMode;
   Target get target => null;
 
   final List<Step> steps;
 
+  Program platform;
+
   ClosureConversionContext(this.strongMode, bool updateExpectations)
       : steps = <Step>[
           const Compile(),
           const Print(),
           const Verify(true),
           const ClosureConversion(),
           const Print(),
           const Verify(true),
           new MatchExpectation(".expect",
               updateExpectations: updateExpectations),
           const WriteDill(),
           const ReadDill(),
           // TODO(29143): add `Run` step when Vectors are added to VM.
+          //const Run(),
         ];
 
   static Future<ClosureConversionContext> create(
       Chain suite, Map<String, String> environment) async {
     bool strongMode = environment.containsKey(STRONG_MODE);
     bool updateExpectations = environment["updateExpectations"] == "true";
     return new ClosureConversionContext(strongMode, updateExpectations);
   }
 }
 
@@ skipping 17 matching lines @@
       Library library = program.libraries
           .firstWhere((Library library) => library.importUri.scheme != "dart");
       closure_conversion.transformLibraries(coreTypes, <Library>[library]);
       return pass(program);
     } catch (e, s) {
       return crash(e, s);
     }
   }
 }
 
+class Run extends Step<Uri, int, ClosureConversionContext> {
+  const Run();
+
+  String get name => "run";
+
+  Future<Result<int>> run(Uri uri, ClosureConversionContext context) async {
+    final File generated = new File.fromUri(uri);
+    try {
+      Uri sdk = await computePatchedSdk();
+      Uri vm = computeDartVm(sdk);
+      final StdioProcess process = await StdioProcess
+          .run(vm.toFilePath(), [generated.path, "Hello, World!"]);
+      print(process.output);
+      return process.toResult();
+    } finally {
+      generated.parent.delete(recursive: true);
+    }
+  }
+}
+
 main(List<String> arguments) => runMe(arguments, createContext, "testing.json");