Add --set-exit-code-on-problem option.

pkg/front_end/lib/src/kernel_generator_impl.dart

Index: pkg/front_end/lib/src/kernel_generator_impl.dart
diff --git a/pkg/front_end/lib/src/kernel_generator_impl.dart b/pkg/front_end/lib/src/kernel_generator_impl.dart
index 3f3960695a5df626a35e86c7ba52a3c4b83c96f7..aa3e503d71da4d8d1e733dfea03bfec054bbbb6d 100644
--- a/pkg/front_end/lib/src/kernel_generator_impl.dart
+++ b/pkg/front_end/lib/src/kernel_generator_impl.dart
@@ -11,13 +11,14 @@ import 'dart:async';
 import 'package:kernel/kernel.dart' show Program, CanonicalName;
 
 import 'base/processed_options.dart';
-import 'fasta/dill/dill_target.dart' show DillTarget;
+import 'fasta/compiler_command_line.dart' show CompilerCommandLine;
+import 'fasta/compiler_context.dart' show CompilerContext;
 import 'fasta/deprecated_problems.dart' show deprecated_InputError, reportCrash;
+import 'fasta/dill/dill_target.dart' show DillTarget;
 import 'fasta/kernel/kernel_outline_shaker.dart';
 import 'fasta/kernel/kernel_target.dart' show KernelTarget;
-import 'fasta/kernel/verifier.dart';
 import 'fasta/kernel/utils.dart';
-import 'fasta/compiler_command_line.dart';
+import 'fasta/kernel/verifier.dart';
 import 'fasta/translate_uri.dart' show TranslateUri;
 
 /// Implementation for the `package:front_end/kernel_generator.dart` and
@@ -27,7 +28,7 @@ Future<CompilerResult> generateKernel(ProcessedOptions options,
     bool buildProgram: true,
     bool trimDependencies: false}) async {
   // TODO(sigmund): Replace CompilerCommandLine and instead simply use a
-  // CompilerContext that directly uses the ProcessedOptions throught the
+  // CompilerContext that directly uses the ProcessedOptions through the
   // system.
   String programName = "";
   List<String> arguments = <String>[programName, "--target=none"];
@@ -37,6 +38,9 @@ Future<CompilerResult> generateKernel(ProcessedOptions options,
   if (options.verbose) {
     arguments.add("--verbose");
   }
+  if (options.setExitCodeOnProblem) {
+    arguments.add("--set-exit-code-on-problem");
+  }
   return await CompilerCommandLine.withGlobalOptions(programName, arguments,
       (CompilerContext context) async {
     context.options.options["--target"] = options.target;