Reapply "Use backend targets to run Kernel transformations in Fasta"

pkg/front_end/test/fasta/testing/suite.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.md file.
 
 library fasta.testing.suite;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show File;
 
@@ skipping 32 matching lines @@
 
 import 'package:analyzer/src/fasta/analyzer_target.dart' show AnalyzerTarget;
 
 import 'package:front_end/src/fasta/kernel/kernel_target.dart'
     show KernelTarget;
 
 import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget;
 
 import 'package:kernel/kernel.dart' show loadProgramFromBytes;
 
+import 'package:kernel/target/targets.dart' show TargetFlags;
+
 export 'package:testing/testing.dart' show Chain, runMe;
 
 const String STRONG_MODE = " strong mode ";
 
 const String ENABLE_FULL_COMPILE = " full compile ";
 
 const String AST_KIND_INDEX = " AST kind index ";
 
 const String EXPECTATIONS = '''
 [
@@ skipping 146 matching lines @@
 
   bool get isCompiler => fullCompile;
 
   Future<Result<Program>> run(
       TestDescription description, FastaContext context) async {
     // Disable colors to ensure that expectation files are the same across
     // platforms and independent of stdin/stderr.
     CompilerContext.current.disableColors();
     Program platformOutline = await context.loadPlatformOutline();
     Ticker ticker = new Ticker();
-    DillTarget dillTarget = new DillTarget(ticker, context.uriTranslator, "vm");
+    DillTarget dillTarget = new DillTarget(
+        ticker, context.uriTranslator, "vm_fasta",
+        flags: new TargetFlags(strongMode: strongMode));
     platformOutline.unbindCanonicalNames();
     dillTarget.loader.appendLibraries(platformOutline);
     // We create a new URI translator to avoid reading plaform libraries from
     // file system.
     TranslateUri uriTranslator = new TranslateUri(
         context.uriTranslator.packages,
         const <String, Uri>{},
         const <String, List<Uri>>{});
     KernelTarget sourceTarget = astKind == AstKind.Analyzer
         ? new AnalyzerTarget(dillTarget, uriTranslator, strongMode)
         : new KernelTarget(
-            PhysicalFileSystem.instance, dillTarget, uriTranslator, strongMode);
+            PhysicalFileSystem.instance, dillTarget, uriTranslator);
 
     Program p;
     try {
       sourceTarget.read(description.uri);
       await dillTarget.buildOutlines();
       ValidatingInstrumentation instrumentation;
       if (strongMode) {
         instrumentation = new ValidatingInstrumentation();
         await instrumentation.loadExpectations(description.uri);
         sourceTarget.loader.instrumentation = instrumentation;
       }
       p = await sourceTarget.buildOutlines();
       if (fullCompile) {
         p = await sourceTarget.buildProgram(trimDependencies: true);
         instrumentation?.finish();
         if (instrumentation != null && instrumentation.hasProblems) {
           if (updateComments) {
             await instrumentation.fixSource(description.uri, false);
           } else {
             return fail(null, instrumentation.problemsAsString);
           }
         }
       }
     } on InputError catch (e, s) {
       return fail(null, e.error, s);
     }
     return pass(p);
   }
 }