Move code for instantiating Invocation to Target.

pkg/front_end/lib/src/fasta/fasta.dart

Index: pkg/front_end/lib/src/fasta/fasta.dart
diff --git a/pkg/front_end/lib/src/fasta/fasta.dart b/pkg/front_end/lib/src/fasta/fasta.dart
index 821c7fc9b7b46807fbefd99fd58252d75944f5bd..b6bc4707f3794f1aede92504d328aad9ac0eca24 100644
--- a/pkg/front_end/lib/src/fasta/fasta.dart
+++ b/pkg/front_end/lib/src/fasta/fasta.dart
@@ -114,7 +114,7 @@ class CompileTask {
   CompileTask(this.c, this.ticker);
 
   DillTarget createDillTarget(TranslateUri uriTranslator) {
-    return new DillTarget(ticker, uriTranslator);
+    return new DillTarget(ticker, uriTranslator, c.options.target);
   }
 
   KernelTarget createKernelTarget(
@@ -179,7 +179,8 @@ Future<CompilationResult> parseScript(
 
 Future<CompilationResult> parseScriptInFileSystem(
     Uri fileName, FileSystem fileSystem, Uri packages, Uri patchedSdk,
-    {bool verbose: false, bool strongMode: false}) async {
+    {bool verbose: false, bool strongMode: false, String backendTarget}) async {
+  backendTarget ??= "vm";
   try {
     if (!await fileSystem.entityForUri(fileName).exists()) {
       return new CompilationResult.error(
@@ -195,7 +196,8 @@ Future<CompilationResult> parseScriptInFileSystem(
       TranslateUri uriTranslator =
           await TranslateUri.parse(fileSystem, null, packages);
       final Ticker ticker = new Ticker(isVerbose: verbose);
-      final DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+      final DillTarget dillTarget =
+          new DillTarget(ticker, uriTranslator, backendTarget);
       _appendDillForUri(dillTarget, patchedSdk.resolve('platform.dill'));
       final KernelTarget kernelTarget =
           new KernelTarget(fileSystem, dillTarget, uriTranslator, strongMode);
@@ -253,7 +255,9 @@ Future writeDepsFile(Uri script, Uri depsFile, Uri output,
     {Uri packages,
     Uri platform,
     Iterable<Uri> extraDependencies,
-    bool verbose: false}) async {
+    bool verbose: false,
+    String backendTarget}) async {
+  backendTarget ??= "vm";
   Ticker ticker = new Ticker(isVerbose: verbose);
   await CompilerCommandLine.withGlobalOptions("", [""],
       (CompilerContext c) async {
@@ -265,7 +269,8 @@ Future writeDepsFile(Uri script, Uri depsFile, Uri output,
     TranslateUri uriTranslator = await TranslateUri.parse(
         c.fileSystem, c.options.sdk, c.options.packages);
     ticker.logMs("Read packages file");
-    DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+    DillTarget dillTarget =
+        new DillTarget(ticker, uriTranslator, backendTarget);
     _appendDillForUri(dillTarget, platform);
     KernelTarget kernelTarget = new KernelTarget(PhysicalFileSystem.instance,
         dillTarget, uriTranslator, false, c.uriToSource);