Implement nested switches and missing switch continue targets.

pkg/front_end/lib/src/fasta/fasta.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;
 
 import 'dart:async' show Future;
 
 import 'dart:convert' show JSON;
 
 import 'dart:io' show BytesBuilder, Directory, File, exitCode;
 
 import 'package:kernel/binary/ast_to_binary.dart' show BinaryPrinter;
 
 import 'package:kernel/kernel.dart' show Program;
 
 import 'package:kernel/target/targets.dart' show Target, TargetFlags, getTarget;
 
-import 'kernel/verifier.dart' show verifyProgram;
-
 import 'compiler_command_line.dart' show CompilerCommandLine;
 
 import 'compiler_context.dart' show CompilerContext;
 
 import 'errors.dart' show InputError, formatUnexpected, inputError, reportCrash;
 
 import 'kernel/kernel_target.dart' show KernelTarget;
 
 import 'dill/dill_target.dart' show DillTarget;
 
@@ skipping 106 matching lines @@
     if (c.options.dumpIr && output != null) {
       kernelTarget.dumpIr();
     }
     return kernelTarget;
   }
 
   Future<Uri> compile() async {
     KernelTarget kernelTarget = await buildOutline();
     if (exitCode != 0) return null;
     Uri uri = c.options.output;
-    await kernelTarget.writeProgram(uri);
-    if (c.options.dumpIr) {
-      kernelTarget.dumpIr();
-    }
-    if (c.options.verify) {
-      try {
-        verifyProgram(kernelTarget.program);
-        ticker.logMs("Verified program");
-      } catch (e, s) {
-        exitCode = 1;
-        print("Verification of program failed: $e");
-        if (s != null && c.options.verbose) {
-          print(s);
-        }
-      }
-    }
+    await kernelTarget.writeProgram(uri,
+        dumpIr: c.options.dumpIr, verify: c.options.verify);
     return uri;
   }
 }
 
 Future<CompilationResult> parseScript(
     Uri fileName, Uri packages, Uri patchedSdk, bool verbose) async {
   try {
     if (!await new File.fromUri(fileName).exists()) {
       return new CompilationResult.error(
           formatUnexpected(fileName, -1, "No such file."));
@@ skipping 44 matching lines @@
   final BytesBuilder builder = new BytesBuilder();
 
   void add(List<int> data) {
     builder.add(data);
   }
 
   void close() {
     // Nothing to do.
   }
 }