[flutter_tools] add canvaskit hot reload integration test (#69550)

packages/flutter_tools/test/integration.shard/hot_reload_web_test.dart

@@ -30,7 +30,7 @@ void main() {
   testWithoutContext('hot restart works without error', () async {
     await flutter.run(chrome: true);
     await flutter.hotRestart();
-  }, skip: platform.isMacOS);
+  }, skip: platform.isMacOS, retry: 1);
 
   testWithoutContext('newly added code executes during hot restart', () async {
     final Completer<void> completer = Completer<void>();
@@ -48,5 +48,23 @@ void main() {
     } finally {
       await subscription.cancel();
     }
-  }, skip: platform.isMacOS);
+  }, skip: platform.isMacOS, retry: 1);
+
+  testWithoutContext('newly added code executes during hot restart - canvaskit', () async {
+    final Completer<void> completer = Completer<void>();
+    final StreamSubscription<String> subscription = flutter.stdout.listen((String line) {
+      print(line);
+      if (line.contains('(((((RELOAD WORKED)))))')) {
+        completer.complete();
+      }
+    });
+    await flutter.run(chrome: true, additionalCommandArgs: <String>['--dart-define=FLUTTER_WEB_USE_SKIA=true']);
+    project.uncommentHotReloadPrint();
+    try {
+      await flutter.hotRestart();
+      await completer.future;
+    } finally {
+      await subscription.cancel();
+    }
+  }, skip: true, retry: 1); // Currently broken: Expected a value of type 'Future<_RegisteredFont>', but got one of type '_Future<_RegisteredFont?>
 }

packages/flutter_tools/test/integration.shard/test_driver.dart

@@ -451,6 +451,7 @@ class FlutterRunTestDriver extends FlutterTestDriver {
     bool singleWidgetReloads = false,
     File pidFile,
     String script,
+    List<String> additionalCommandArgs,
   }) async {
     await _setupProcess(
       <String>[
@@ -471,6 +472,7 @@ class FlutterRunTestDriver extends FlutterTestDriver {
           'flutter-tester',
         if (structuredErrors)
           '--dart-define=flutter.inspector.structuredErrors=true',
+        ...?additionalCommandArgs,
       ],
       withDebugger: withDebugger,
       startPaused: startPaused,