Move tools to tool folder.

pkg/front_end/test/kernel_generator_test.dart

 // Copyright (c) 2017, 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.
 
 import 'package:front_end/front_end.dart';
 import 'package:front_end/src/fasta/fasta_codes.dart';
 import 'package:front_end/src/fasta/kernel/utils.dart';
 import 'package:front_end/src/fasta/deprecated_problems.dart'
     show deprecated_InputError;
 import 'package:front_end/src/testing/compiler_common.dart';
@@ skipping 45 matching lines @@
       expect(printMember.function.body is EmptyStatement, isTrue);
     });
 
     test('compiler requires a main method', () async {
       var errors = [];
       var options = new CompilerOptions()..onError = (e) => errors.add(e);
       await compileScript('a() => print("hi");', options: options);
       expect(errors.first.message, messageMissingMain.message);
     });
 
+    // TODO(ahe): This test is wrong at least with respect to expecting that
+    // [deprecated_InputError] leaks through the API. Furthermore, the default
+    // behavior should be to recover from errors, as this is the most important
+    // use case we have.
     test('default error handler throws on errors', () async {
       var options = new CompilerOptions();
       var exceptionThrown = false;
       try {
         await compileScript('a() => print("hi");', options: options);
       } on deprecated_InputError catch (e) {
         exceptionThrown = true;
         expect('${e.error}', contains("Compilation aborted"));
       }
       expect(exceptionThrown, isTrue);
-    });
+    }, skip: true /* Issue 30194 */);
 
     test('generated program contains source-info', () async {
       var program = await compileScript('a() => print("hi"); main() {}',
           fileName: 'a.dart');
       // Kernel always store an empty '' key in the map, so there is always at
       // least one. Having more means that source-info is added.
       expect(program.uriToSource.keys.length, greaterThan(1));
       expect(program.uriToSource['file:///a/b/c/a.dart'], isNotNull);
     });
 
@@ skipping 119 matching lines @@
       checkDCallsC(unitD1);
 
       var unitD2 = await compileUnit(['d.dart'], sources,
           inputSummaries: ['bc.dill', 'a.dill']);
       checkDCallsC(unitD2);
     });
 
     // TODO(sigmund): add tests with trimming dependencies
   });
 }