support for downloads in history

packages/flutter_mozilla_components/lib/src/domain/services/gecko_history.dart

@@ -26,7 +26,20 @@ class GeckoHistoryService {
   }
 
   Future<void> deleteVisit(VisitInfo info) {
-    return _api.deleteVisit(info.url, info.visitTime);
+    switch (info.visitType) {
+      case VisitType.link:
+      case VisitType.typed:
+      case VisitType.embed:
+      case VisitType.redirectPermanent:
+      case VisitType.redirectTemporary:
+      case VisitType.framedLink:
+      case VisitType.reload:
+        return _api.deleteVisit(info.url, info.visitTime);
+      case VisitType.download:
+        return _api.deleteDownload(info.contentId!);
+      case VisitType.bookmark:
+        throw UnimplementedError();
+    }
   }
 
   Future<void> deleteVisitsBetween(DateTime start, DateTime end) {

packages/flutter_mozilla_components/lib/src/pigeons/gecko.g.dart

@@ -1257,6 +1257,7 @@ class VisitInfo {
     required this.visitType,
     this.previewImageUrl,
     required this.isRemote,
+    this.contentId,
   });
 
   String url;
@@ -1271,6 +1272,8 @@ class VisitInfo {
 
   bool isRemote;
 
+  String? contentId;
+
   List<Object?> _toList() {
     return <Object?>[
       url,
@@ -1279,6 +1282,7 @@ class VisitInfo {
       visitType,
       previewImageUrl,
       isRemote,
+      contentId,
     ];
   }
 
@@ -1294,6 +1298,7 @@ class VisitInfo {
       visitType: result[3]! as VisitType,
       previewImageUrl: result[4] as String?,
       isRemote: result[5]! as bool,
+      contentId: result[6] as String?,
     );
   }
 
@@ -5783,6 +5788,29 @@ class GeckoHistoryApi {
     }
   }
 
+  Future<void> deleteDownload(String id) async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoHistoryApi.deleteDownload$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[id]);
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else {
+      return;
+    }
+  }
+
   Future<void> deleteVisitsBetween(int startMillis, int endMillis) async {
     final String pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoHistoryApi.deleteVisitsBetween$pigeonVar_messageChannelSuffix';
     final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(