Skip tests with Chrome on Windows. (#4169)

Author: davidmorgan

_test/test/common/utils.dart

@@ -213,6 +213,8 @@ Future<void> expectTestsFail({
   List<String>? buildArgs,
   List<String>? testArgs,
 }) async {
+  // Skip on Windows due to Chrome test flakiness, see
+  // https://github.com/dart-lang/build/issues/4123.
   var result = await runTests(
     usePrecompiled: usePrecompiled,
     buildArgs: buildArgs,

_test/test/test_integration_test.dart

@@ -5,6 +5,8 @@
 @TestOn('vm')
 library;
 
+import 'dart:io';
+
 import 'package:io/io.dart';
 import 'package:path/path.dart' as p;
 import 'package:test/test.dart';
@@ -36,6 +38,9 @@ void main() {
   );
 
   test('Failing tests print mapped stack traces', () async {
+    // Skip on Windows due to Chrome test flakiness, see
+    // https://github.com/dart-lang/build/issues/4123.
+    if (Platform.isWindows) return;
     var result = await runTests(
       testArgs: ['--run-skipped', 'test/hello_world_test.dart'],
     );