Move code for instantiating Invocation to Target.

pkg/front_end/lib/src/fasta/compile_platform.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 fasta.compile_platform;
 
 import 'dart:async' show Future;
 
-import 'package:front_end/src/fasta/kernel/utils.dart';
-import 'ticker.dart' show Ticker;
-
 import 'dart:io' show exitCode;
 
 import 'compiler_command_line.dart' show CompilerCommandLine;
 
 import 'compiler_context.dart' show CompilerContext;
 
+import 'dill/dill_target.dart' show DillTarget;
+
 import 'errors.dart' show InputError;
 
 import 'kernel/kernel_target.dart' show KernelTarget;
 
-import 'dill/dill_target.dart' show DillTarget;
+import 'kernel/utils.dart' show printProgramText, writeProgramToFile;
+
+import 'ticker.dart' show Ticker;
 
 import 'translate_uri.dart' show TranslateUri;
 
 const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);
 
 Future mainEntryPoint(List<String> arguments) async {
   for (int i = 0; i < iterations; i++) {
     if (i > 0) {
       print("\n");
     }
@@ skipping 30 matching lines @@
   ticker.logMs("Parsed arguments");
   if (ticker.isVerbose) {
     print("Generating outline of $patchedSdk into $outlineOutput");
     print("Compiling $patchedSdk to $fullOutput");
   }
 
   TranslateUri uriTranslator =
       await TranslateUri.parse(c.fileSystem, patchedSdk, c.options.packages);
   ticker.logMs("Read packages file");
 
-  DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+  DillTarget dillTarget =
+      new DillTarget(ticker, uriTranslator, c.options.target);
   KernelTarget kernelTarget = new KernelTarget(c.fileSystem, dillTarget,
       uriTranslator, c.options.strongMode, c.uriToSource);
 
   kernelTarget.read(Uri.parse("dart:core"));
   await dillTarget.buildOutlines();
   var outline = await kernelTarget.buildOutlines();
 
   await writeProgramToFile(outline, outlineOutput);
   ticker.logMs("Wrote outline to ${outlineOutput.toFilePath()}");
 
   if (exitCode != 0) return null;
 
   var program = await kernelTarget.buildProgram(verify: c.options.verify);
   if (c.options.dumpIr) printProgramText(program);
   await writeProgramToFile(program, fullOutput);
   ticker.logMs("Wrote program to ${fullOutput.toFilePath()}");
   await kernelTarget.writeDepsFile(fullOutput, deps);
 }