Simplify null check. (#117026)

* Simplify null check.

* Simplify null check.

* Simplify null check.

* Fix.

packages/flutter_tools/lib/src/device.dart

@@ -1004,45 +1004,45 @@ class DebuggingOptions {
   static DebuggingOptions fromJson(Map<String, Object?> json, BuildInfo buildInfo) =>
     DebuggingOptions._(
       buildInfo: buildInfo,
-      debuggingEnabled: (json['debuggingEnabled'] as bool?)!,
-      startPaused: (json['startPaused'] as bool?)!,
-      dartFlags: (json['dartFlags'] as String?)!,
-      dartEntrypointArgs: ((json['dartEntrypointArgs'] as List<dynamic>?)?.cast<String>())!,
-      disableServiceAuthCodes: (json['disableServiceAuthCodes'] as bool?)!,
-      enableDds: (json['enableDds'] as bool?)!,
-      cacheStartupProfile: (json['cacheStartupProfile'] as bool?)!,
-      enableSoftwareRendering: (json['enableSoftwareRendering'] as bool?)!,
-      skiaDeterministicRendering: (json['skiaDeterministicRendering'] as bool?)!,
-      traceSkia: (json['traceSkia'] as bool?)!,
+      debuggingEnabled: json['debuggingEnabled']! as bool,
+      startPaused: json['startPaused']! as bool,
+      dartFlags: json['dartFlags']! as String,
+      dartEntrypointArgs: (json['dartEntrypointArgs']! as List<dynamic>).cast<String>(),
+      disableServiceAuthCodes: json['disableServiceAuthCodes']! as bool,
+      enableDds: json['enableDds']! as bool,
+      cacheStartupProfile: json['cacheStartupProfile']! as bool,
+      enableSoftwareRendering: json['enableSoftwareRendering']! as bool,
+      skiaDeterministicRendering: json['skiaDeterministicRendering']! as bool,
+      traceSkia: json['traceSkia']! as bool,
       traceAllowlist: json['traceAllowlist'] as String?,
       traceSkiaAllowlist: json['traceSkiaAllowlist'] as String?,
-      traceSystrace: (json['traceSystrace'] as bool?)!,
-      endlessTraceBuffer: (json['endlessTraceBuffer'] as bool?)!,
-      dumpSkpOnShaderCompilation: (json['dumpSkpOnShaderCompilation'] as bool?)!,
-      cacheSkSL: (json['cacheSkSL'] as bool?)!,
-      purgePersistentCache: (json['purgePersistentCache'] as bool?)!,
-      useTestFonts: (json['useTestFonts'] as bool?)!,
-      verboseSystemLogs: (json['verboseSystemLogs'] as bool?)!,
+      traceSystrace: json['traceSystrace']! as bool,
+      endlessTraceBuffer: json['endlessTraceBuffer']! as bool,
+      dumpSkpOnShaderCompilation: json['dumpSkpOnShaderCompilation']! as bool,
+      cacheSkSL: json['cacheSkSL']! as bool,
+      purgePersistentCache: json['purgePersistentCache']! as bool,
+      useTestFonts: json['useTestFonts']! as bool,
+      verboseSystemLogs: json['verboseSystemLogs']! as bool,
       hostVmServicePort: json['hostVmServicePort'] as int? ,
       deviceVmServicePort: json['deviceVmServicePort'] as int?,
-      disablePortPublication: (json['disablePortPublication'] as bool?)!,
+      disablePortPublication: json['disablePortPublication']! as bool,
       ddsPort: json['ddsPort'] as int?,
       devToolsServerAddress: json['devToolsServerAddress'] != null ? Uri.parse(json['devToolsServerAddress']! as String) : null,
       port: json['port'] as String?,
       hostname: json['hostname'] as String?,
       webEnableExposeUrl: json['webEnableExposeUrl'] as bool?,
-      webUseSseForDebugProxy: (json['webUseSseForDebugProxy'] as bool?)!,
-      webUseSseForDebugBackend: (json['webUseSseForDebugBackend'] as bool?)!,
-      webUseSseForInjectedClient: (json['webUseSseForInjectedClient'] as bool?)!,
-      webRunHeadless: (json['webRunHeadless'] as bool?)!,
+      webUseSseForDebugProxy: json['webUseSseForDebugProxy']! as bool,
+      webUseSseForDebugBackend: json['webUseSseForDebugBackend']! as bool,
+      webUseSseForInjectedClient: json['webUseSseForInjectedClient']! as bool,
+      webRunHeadless: json['webRunHeadless']! as bool,
       webBrowserDebugPort: json['webBrowserDebugPort'] as int?,
-      webBrowserFlags: ((json['webBrowserFlags'] as List<dynamic>?)?.cast<String>())!,
-      webEnableExpressionEvaluation: (json['webEnableExpressionEvaluation'] as bool?)!,
+      webBrowserFlags: (json['webBrowserFlags']! as List<dynamic>).cast<String>(),
+      webEnableExpressionEvaluation: json['webEnableExpressionEvaluation']! as bool,
       webLaunchUrl: json['webLaunchUrl'] as String?,
       vmserviceOutFile: json['vmserviceOutFile'] as String?,
-      fastStart: (json['fastStart'] as bool?)!,
-      nullAssertions: (json['nullAssertions'] as bool?)!,
-      nativeNullAssertions: (json['nativeNullAssertions'] as bool?)!,
+      fastStart: json['fastStart']! as bool,
+      nullAssertions: json['nullAssertions']! as bool,
+      nativeNullAssertions: json['nativeNullAssertions']! as bool,
       enableImpeller: (json['enableImpeller'] as bool?) ?? false,
       uninstallFirst: (json['uninstallFirst'] as bool?) ?? false,
       enableDartProfiling: (json['enableDartProfiling'] as bool?) ?? true,

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

@@ -292,7 +292,7 @@ void main() {
       globals.fs.directory('bundle.app').createSync();
       globals.fs.file('bundle.app/Info.plist').createSync();
       testPlistParser.setProperty('CFBundleIdentifier', 'fooBundleId');
-      final PrebuiltIOSApp iosApp = (IOSApp.fromPrebuiltApp(globals.fs.file('bundle.app')) as PrebuiltIOSApp?)!;
+      final PrebuiltIOSApp iosApp = IOSApp.fromPrebuiltApp(globals.fs.file('bundle.app'))! as PrebuiltIOSApp;
       expect(testLogger.errorText, isEmpty);
       expect(iosApp.uncompressedBundle.path, 'bundle.app');
       expect(iosApp.id, 'fooBundleId');
@@ -343,7 +343,7 @@ void main() {
             .file(globals.fs.path.join(bundleAppDir.path, 'Info.plist'))
             .createSync();
       };
-      final PrebuiltIOSApp iosApp = (IOSApp.fromPrebuiltApp(globals.fs.file('app.ipa')) as PrebuiltIOSApp?)!;
+      final PrebuiltIOSApp iosApp = IOSApp.fromPrebuiltApp(globals.fs.file('app.ipa'))! as PrebuiltIOSApp;
       expect(testLogger.errorText, isEmpty);
       expect(iosApp.uncompressedBundle.path, endsWith('bundle.app'));
       expect(iosApp.id, 'fooBundleId');
@@ -594,7 +594,7 @@ void main() {
 
     testUsingContext('Success with far file', () {
       globals.fs.file('bundle.far').createSync();
-      final PrebuiltFuchsiaApp fuchsiaApp = (FuchsiaApp.fromPrebuiltApp(globals.fs.file('bundle.far')) as PrebuiltFuchsiaApp?)!;
+      final PrebuiltFuchsiaApp fuchsiaApp = FuchsiaApp.fromPrebuiltApp(globals.fs.file('bundle.far'))! as PrebuiltFuchsiaApp;
       expect(testLogger.errorText, isEmpty);
       expect(fuchsiaApp.id, 'bundle.far');
       expect(fuchsiaApp.applicationPackage.path, globals.fs.file('bundle.far').path);

packages/flutter_tools/test/general.shard/dap/mocks.dart

@@ -117,8 +117,8 @@ class MockFlutterDebugAdapter extends FlutterDebugAdapter {
     // Pretend to be the client, delegating any reverse-requests to the relevant
     // handler that is provided by the test.
     if (message is Event && message.event == 'flutter.forwardedRequest') {
-      final Map<String, Object?> body = (message.body as Map<String, Object?>?)!;
-      final String method = (body['method'] as String?)!;
+      final Map<String, Object?> body = message.body! as Map<String, Object?>;
+      final String method = body['method']! as String;
       final Map<String, Object?>? params = body['params'] as Map<String, Object?>?;
 
       final Object? result = _handleReverseRequest(method, params);
@@ -138,7 +138,7 @@ class MockFlutterDebugAdapter extends FlutterDebugAdapter {
   Object? _handleReverseRequest(String method, Map<String, Object?>? params) {
     switch (method) {
       case 'app.exposeUrl':
-        final String url = (params!['url'] as String?)!;
+        final String url = params!['url']! as String;
         return exposeUrlHandler!(url);
       default:
         throw ArgumentError('Reverse-request $method is unknown');

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

@@ -193,6 +193,6 @@ bool _isHotReloadCompletionEvent(Map<String, Object?>? event) {
   return event != null &&
       event['event'] == 'app.progress' &&
       event['params'] != null &&
-      (event['params'] as Map<String, Object?>?)!['progressId'] == 'hot.reload' &&
-      (event['params'] as Map<String, Object?>?)!['finished'] == true;
+      (event['params']! as Map<String, Object?>)['progressId'] == 'hot.reload' &&
+      (event['params']! as Map<String, Object?>)['finished'] == true;
 }

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

@@ -14,7 +14,7 @@ void main() {
       fileSystem.file('templates/template_manifest.json').readAsStringSync(),
     ) as Map<String, Object?>;
     final Set<Uri> declaredFileList = Set<Uri>.from(
-      (manifest['files'] as List<Object?>?)!.cast<String>().map<Uri>(fileSystem.path.toUri));
+      (manifest['files']! as List<Object?>).cast<String>().map<Uri>(fileSystem.path.toUri));
 
     final Set<Uri> activeTemplateList = fileSystem.directory('templates')
       .listSync(recursive: true)