Revert "Roll engine to aed6b8c." (flutter#23170)

This reverts commit a34488d.

Author: dnfield

bin/internal/engine.version

@@ -1 +1 @@
-aed6b8c46b05c7cee4506a9757dd9ea1b40583c2
+08272ee6aa33cc367911ac816f25676c3f439c6d

packages/analysis_options.yaml

@@ -3,11 +3,6 @@
 
 include: ../analysis_options.yaml
 
-analyzer:
-  errors:
-    # https://github.com/dart-lang/sdk/issues/34819
-    invalid_use_of_protected_member: ignore
-
 linter:
   rules:
     - public_member_api_docs

packages/flutter_tools/test/integration/expression_evaluation_test.dart

@@ -6,6 +6,7 @@ import 'dart:async';
 
 import 'package:file/file.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
+import 'package:flutter_tools/src/base/platform.dart';
 
 import 'package:vm_service_client/vm_service_client.dart';
 
@@ -110,6 +111,5 @@ void main() {
     // TODO(dantup): Unskip after flutter-tester is fixed on Windows:
     // https://github.com/flutter/flutter/issues/17833.
     // https://github.com/flutter/flutter/issues/21348.
-    // https://github.com/flutter/flutter/issues/23109
-  }, timeout: const Timeout.factor(6), skip: true);
+  }, timeout: const Timeout.factor(6), skip: platform.isWindows);
 }

packages/flutter_tools/test/integration/flutter_attach_test.dart

@@ -48,6 +48,5 @@ void main() {
       await _flutterAttach.attach(_flutterRun.vmServicePort);
       await _flutterAttach.hotReload();
     });
-    // https://github.com/flutter/flutter/issues/23109
-  }, timeout: const Timeout.factor(6), skip: true);
+  }, timeout: const Timeout.factor(6));
 }

packages/flutter_tools/test/integration/hot_reload_test.dart

@@ -46,6 +46,5 @@ void main() {
           _project.breakpointLine);
       expect(isolate.pauseEvent, isInstanceOf<VMPauseBreakpointEvent>());
     });
-    // https://github.com/flutter/flutter/issues/23109
-  }, timeout: const Timeout.factor(6), skip: true);
+  }, timeout: const Timeout.factor(6));
 }

packages/flutter_tools/test/integration/lifetime_test.dart

@@ -44,6 +44,5 @@ void main() {
       await Future<void>.delayed(requiredLifespan);
       expect(_flutter.hasExited, equals(false));
     });
-    // https://github.com/flutter/flutter/issues/23109
-  }, timeout: const Timeout.factor(6), skip: true);
+  }, timeout: const Timeout.factor(6));
 }