[webview_flutter_platform_interface] Adds support to return null in PlatformWebViewController.setOnJavaScriptTextInputDialog

packages/webview_flutter/webview_flutter_android/test/android_webview_controller_test.mocks.dart

@@ -870,19 +870,6 @@ class MockAndroidWebViewController extends _i1.Mock
         returnValue: _i9.Future<void>.value(),
         returnValueForMissingStub: _i9.Future<void>.value(),
       ) as _i9.Future<void>);
-
-  @override
-  _i9.Future<void> setOnJavaScriptTextInputDialog(
-          _i9.Future<String> Function(_i3.JavaScriptTextInputDialogRequest)?
-              onJavaScriptTextInputDialog) =>
-      (super.noSuchMethod(
-        Invocation.method(
-          #setOnJavaScriptTextInputDialog,
-          [onJavaScriptTextInputDialog],
-        ),
-        returnValue: _i9.Future<void>.value(),
-        returnValueForMissingStub: _i9.Future<void>.value(),
-      ) as _i9.Future<void>);
 }
 
 /// A class which mocks [AndroidWebViewProxy].

packages/webview_flutter/webview_flutter_android/test/android_webview_cookie_manager_test.mocks.dart

@@ -584,19 +584,6 @@ class MockAndroidWebViewController extends _i1.Mock
         returnValue: _i5.Future<void>.value(),
         returnValueForMissingStub: _i5.Future<void>.value(),
       ) as _i5.Future<void>);
-
-  @override
-  _i5.Future<void> setOnJavaScriptTextInputDialog(
-          _i5.Future<String> Function(_i3.JavaScriptTextInputDialogRequest)?
-              onJavaScriptTextInputDialog) =>
-      (super.noSuchMethod(
-        Invocation.method(
-          #setOnJavaScriptTextInputDialog,
-          [onJavaScriptTextInputDialog],
-        ),
-        returnValue: _i5.Future<void>.value(),
-        returnValueForMissingStub: _i5.Future<void>.value(),
-      ) as _i5.Future<void>);
 }
 
 /// A class which mocks [TestInstanceManagerHostApi].

packages/webview_flutter/webview_flutter_platform_interface/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.9.2
+
+* Adds support to return `null` in `PlatformWebViewController.setOnJavaScriptTextInputDialog`.
+
 ## 2.9.1
 
 * Updates minimum required plugin_platform_interface version to 2.1.7.

packages/webview_flutter/webview_flutter_platform_interface/lib/src/platform_webview_controller.dart

@@ -318,7 +318,7 @@ abstract class PlatformWebViewController extends PlatformInterface {
   /// Sets a callback that notifies the host application that the web page
   /// wants to display a JavaScript prompt() dialog.
   Future<void> setOnJavaScriptTextInputDialog(
-      Future<String> Function(JavaScriptTextInputDialogRequest request)
+      Future<String?> Function(JavaScriptTextInputDialogRequest request)
           onJavaScriptTextInputDialog) async {
     throw UnimplementedError(
       'setOnJavaScriptTextInputDialog is not implemented on the current platform',

packages/webview_flutter/webview_flutter_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/packages/tree/main/packages/webview_flutt
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview_flutter%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.9.1
+version: 2.9.2
 
 environment:
   sdk: ">=3.0.0 <4.0.0"

packages/webview_flutter/webview_flutter_platform_interface/test/platform_webview_controller_test.dart

@@ -457,6 +457,20 @@ void main() {
       throwsUnimplementedError,
     );
   });
+
+  test('setOnJavaScriptTextInputDialog should support returning a null value',
+      () {
+    final PlatformWebViewController controller =
+        ExtendsPlatformWebViewController(
+            const PlatformWebViewControllerCreationParams());
+
+    expect(
+      () => controller.setOnJavaScriptTextInputDialog((_) async {
+        return null;
+      }),
+      throwsUnimplementedError,
+    );
+  });
 }
 
 class MockWebViewPlatformWithMixin extends MockWebViewPlatform