Move tools to tool folder.

pkg/front_end/lib/src/fasta/testing/kernel_chain.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.
 
 // TODO(ahe): Copied from closure_conversion branch of kernel, remove this file
 // when closure_conversion is merged with master.
 
 library fasta.testing.kernel_chain;
 
 import 'dart:async' show Future;
@@ skipping 52 matching lines @@
 }
 
 class Verify extends Step<Program, Program, ChainContext> {
   final bool fullCompile;
 
   const Verify(this.fullCompile);
 
   String get name => "verify";
 
   Future<Result<Program>> run(Program program, ChainContext context) async {
-    var options =
-        new ProcessedOptions(new CompilerOptions()..throwOnErrors = false);
+    var options = new ProcessedOptions(new CompilerOptions());
     return await CompilerContext.runWithOptions(options, (_) async {
       var errors = verifyProgram(program, isOutline: !fullCompile);
       if (errors.isEmpty) {
         return pass(program);
       } else {
         return new Result<Program>(
             null, context.expectationSet["VerificationError"], errors, null);
       }
     });
   }
@@ skipping 173 matching lines @@
 
 Future openWrite(Uri uri, f(IOSink sink)) async {
   IOSink sink = new File.fromUri(uri).openWrite();
   try {
     await f(sink);
   } finally {
     await sink.close();
   }
   print("Wrote $uri");
 }