Register reload sources call and make 'r' restart for web (#39950)

packages/flutter_tools/lib/src/build_runner/resident_web_runner.dart

@@ -43,11 +43,6 @@ class DwdsWebRunnerFactory extends WebRunnerFactory {
   }
 }
 
-// TODO(jonahwilliams): remove this constant when the error message is removed.
-// The web engine is currently spamming this message on certain pages. Filter it out
-// until we remove it entirely. See flutter/flutter##37625.
-const String _kBadError = 'WARNING: 3D transformation matrix was passed to BitmapCanvas.';
-
 /// A hot-runner which handles browser specific delegation.
 class ResidentWebRunner extends ResidentRunner {
   ResidentWebRunner(this.device, {
@@ -207,11 +202,9 @@ class ResidentWebRunner extends ResidentRunner {
     if (supportsServiceProtocol) {
       _stdOutSub = _debugConnection.vmService.onStdoutEvent.listen((vmservice.Event log) {
         final String message = utf8.decode(base64.decode(log.bytes)).trim();
-        // TODO(jonahwilliams): remove this error once it is gone from the engine #37625.
-        if (!message.contains(_kBadError)) {
-          printStatus(message);
-        }
+        printStatus(message);
       });
+      unawaited(_debugConnection.vmService.registerService('reloadSources', 'FlutterTools'));
       websocketUri = Uri.parse(_debugConnection.uri);
     }
     if (websocketUri != null) {
@@ -232,9 +225,6 @@ class ResidentWebRunner extends ResidentRunner {
     String reason,
     bool benchmarkMode = false,
   }) async {
-    if (!fullRestart) {
-      return OperationResult(1, 'hot reload not supported on the web.');
-    }
     final Stopwatch timer = Stopwatch()..start();
     final Status status = logger.startProgress(
       'Performing hot restart...',

packages/flutter_tools/test/general.shard/resident_web_runner_test.dart

@@ -114,21 +114,27 @@ void main() {
     ));
     final DebugConnectionInfo debugConnectionInfo = await connectionInfoCompleter.future;
 
+    verify(mockVmService.registerService('reloadSources', 'FlutterTools')).called(1);
     expect(bufferLogger.statusText, contains('Debug service listening on ws://127.0.0.1/abcd/'));
     expect(debugConnectionInfo.wsUri.toString(), 'ws://127.0.0.1/abcd/');
   }));
 
-  test('Can not hot reload after attaching', () => testbed.run(() async {
-    _setupMocks();
+  test('Can hot reload after attaching', () => testbed.run(() async {
+  _setupMocks();
     final Completer<DebugConnectionInfo> connectionInfoCompleter = Completer<DebugConnectionInfo>();
      unawaited(residentWebRunner.run(
       connectionInfoCompleter: connectionInfoCompleter,
     ));
     await connectionInfoCompleter.future;
+    when(mockWebFs.recompile()).thenAnswer((Invocation _) async {
+      return true;
+    });
+    when(mockVmService.callServiceExtension('hotRestart')).thenAnswer((Invocation _) async {
+      return Response.parse(<String, Object>{'type': 'Success'});
+    });
     final OperationResult result = await residentWebRunner.restart(fullRestart: false);
 
-    expect(result.code, 1);
-    expect(result.message, contains('hot reload not supported on the web.'));
+    expect(result.code, 0);
   }));
 
   test('Can hot restart after attaching', () => testbed.run(() async {
@@ -374,7 +380,6 @@ void main() {
   }));
 }
 
-
 class MockWebDevice extends Mock implements Device {}
 class MockBuildDaemonCreator extends Mock implements BuildDaemonCreator {}
 class MockFlutterWebFs extends Mock implements WebFs {}