docs and added a test

packages/webview_flutter/webview_flutter_android/test/android_webview_controller_test.dart

@@ -613,7 +613,7 @@ void main() {
       expect(fileSelectorParams.mode, FileSelectorMode.open);
     });
 
-    test('setOnPermissionRequest', () async {
+    test('setOnPlatformPermissionRequest', () async {
       late final void Function(
         android_webview.WebChromeClient instance,
         android_webview.PermissionRequest request,
@@ -661,6 +661,48 @@ void main() {
       verify(mockPermissionRequest.grant(permissionTypes));
     });
 
+    test(
+        'setOnPlatformPermissionRequest callback not invoked when type is not recognized',
+        () async {
+      late final void Function(
+        android_webview.WebChromeClient instance,
+        android_webview.PermissionRequest request,
+      ) onPermissionRequestCallback;
+
+      final MockWebChromeClient mockWebChromeClient = MockWebChromeClient();
+      final AndroidWebViewController controller = createControllerWithMocks(
+        createWebChromeClient: ({
+          dynamic onProgressChanged,
+          dynamic onShowFileChooser,
+          void Function(
+            android_webview.WebChromeClient instance,
+            android_webview.PermissionRequest request,
+          )? onPermissionRequest,
+        }) {
+          onPermissionRequestCallback = onPermissionRequest!;
+          return mockWebChromeClient;
+        },
+      );
+
+      bool callbackCalled = false;
+      await controller.setOnPlatformPermissionRequest(
+        (PlatformWebViewPermissionRequest request) async {
+          callbackCalled = true;
+        },
+      );
+
+      final MockPermissionRequest mockPermissionRequest =
+          MockPermissionRequest();
+      when(mockPermissionRequest.resources).thenReturn(<String>['unknownType']);
+
+      onPermissionRequestCallback(
+        android_webview.WebChromeClient.detached(),
+        mockPermissionRequest,
+      );
+
+      expect(callbackCalled, isFalse);
+    });
+
     test('runJavaScript', () async {
       final MockWebView mockWebView = MockWebView();
       final AndroidWebViewController controller = createControllerWithMocks(

packages/webview_flutter/webview_flutter_platform_interface/CHANGELOG.md

@@ -1,7 +1,10 @@
-## 2.2.0
+## 2.3.0
 
 * Adds support to receive permission requests. See
   `PlatformWebViewController.setOnPlatformPermissionRequest`.
+
+## 2.2.0
+
 * Updates minimum Flutter version to 3.3.
 * Fixes common typos in tests and documentation.
 * Adds support for listening to HTTP errors. See

packages/webview_flutter/webview_flutter_platform_interface/lib/src/types/platform_webview_permission_request.dart

@@ -49,7 +49,7 @@ class WebViewPermissionResourceType {
 
 /// Permissions request when web content requests access to protected resources.
 ///
-/// A response MUST be provided by calling a method from [response].
+/// A response MUST be provided by calling a provided method.
 ///
 /// Platform specific implementations can add additional methods when extending
 /// this class.

packages/webview_flutter/webview_flutter_wkwebview/pigeons/web_kit.dart

@@ -239,6 +239,9 @@ enum WKMediaCaptureType {
   microphone,
 
   /// An unknown media device.
+  ///
+  /// This does not represent an actual value provided by the platform and only
+  /// indicates a value was provided that we don't currently support.
   unknown,
 }