Fix (insert|move|remove)RenderObjectChild methods in base class (#123276)

packages/flutter/lib/src/cupertino/dialog.dart

@@ -856,7 +856,7 @@ class _CupertinoDialogRenderElement extends RenderObjectElement {
   @override
   void moveRenderObjectChild(RenderObject child, _AlertDialogSections oldSlot, _AlertDialogSections newSlot) {
     if (!allowMoveRenderObjectChild) {
-      super.moveRenderObjectChild(child, oldSlot, newSlot);
+      assert(false);
       return;
     }
 

packages/flutter/lib/src/widgets/framework.dart

@@ -6290,30 +6290,7 @@ abstract class RenderObjectElement extends Element {
   /// [IndexedSlot] is a convenient value for the slot.
   /// {@endtemplate}
   @protected
-  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) {
-    assert(() {
-      throw FlutterError.fromParts(<DiagnosticsNode>[
-        ErrorSummary('RenderObjectElement.insertChildRenderObject() is deprecated.'),
-        toDiagnosticsNode(
-          name: 'insertChildRenderObject() was called on this Element',
-          style: DiagnosticsTreeStyle.shallow,
-        ),
-        ErrorDescription(
-          'insertChildRenderObject() has been deprecated in favor of '
-          'insertRenderObjectChild(). See https://github.com/flutter/flutter/issues/63269 '
-          'for details.',
-        ),
-        ErrorHint(
-          'Rather than overriding insertChildRenderObject() in your '
-          'RenderObjectElement subclass, override insertRenderObjectChild() instead, '
-          "and DON'T call super.insertRenderObjectChild(). If you're implementing a "
-          'new RenderObjectElement, you should override/implement '
-          'insertRenderObjectChild(), moveRenderObjectChild(), and '
-          'removeRenderObjectChild().',
-        ),
-      ]);
-    }());
-  }
+  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot);
 
   /// Move the given child from the given old slot to the given new slot.
   ///
@@ -6330,60 +6307,14 @@ abstract class RenderObjectElement extends Element {
   /// compared against each other for the purposes of updating one slot with the
   /// element from another slot) would never call this.
   @protected
-  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot) {
-    assert(() {
-      throw FlutterError.fromParts(<DiagnosticsNode>[
-        ErrorSummary('RenderObjectElement.moveChildRenderObject() is deprecated.'),
-        toDiagnosticsNode(
-          name: 'super.moveChildRenderObject() was called on this Element',
-          style: DiagnosticsTreeStyle.shallow,
-        ),
-        ErrorDescription(
-          'moveChildRenderObject() has been deprecated in favor of '
-          'moveRenderObjectChild(). See https://github.com/flutter/flutter/issues/63269 '
-          'for details.',
-        ),
-        ErrorHint(
-          'Rather than overriding moveChildRenderObject() in your '
-          'RenderObjectElement subclass, override moveRenderObjectChild() instead, '
-          "and DON'T call super.moveRenderObjectChild(). If you're implementing a "
-          'new RenderObjectElement, you should override/implement '
-          'insertRenderObjectChild(), moveRenderObjectChild(), and '
-          'removeRenderObjectChild().',
-        ),
-      ]);
-    }());
-  }
+  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot);
 
   /// Remove the given child from [renderObject].
   ///
   /// The given child is guaranteed to have been inserted at the given `slot`
   /// and have [renderObject] as its parent.
   @protected
-  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot) {
-    assert(() {
-      throw FlutterError.fromParts(<DiagnosticsNode>[
-        ErrorSummary('RenderObjectElement.removeChildRenderObject() is deprecated.'),
-        toDiagnosticsNode(
-          name: 'super.removeChildRenderObject() was called on this Element',
-          style: DiagnosticsTreeStyle.shallow,
-        ),
-        ErrorDescription(
-          'removeChildRenderObject() has been deprecated in favor of '
-          'removeRenderObjectChild(). See https://github.com/flutter/flutter/issues/63269 '
-          'for details.',
-        ),
-        ErrorHint(
-          'Rather than overriding removeChildRenderObject() in your '
-          'RenderObjectElement subclass, override removeRenderObjectChild() instead, '
-          "and DON'T call super.removeRenderObjectChild(). If you're implementing a "
-          'new RenderObjectElement, you should override/implement '
-          'insertRenderObjectChild(), moveRenderObjectChild(), and '
-          'removeRenderObjectChild().',
-        ),
-      ]);
-    }());
-  }
+  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot);
 
   @override
   void debugFillProperties(DiagnosticPropertiesBuilder properties) {

packages/flutter/test/widgets/framework_test.dart

@@ -2119,6 +2119,15 @@ class FakeLeafRenderObject extends RenderBox {
 
 class TestRenderObjectElement extends RenderObjectElement {
   TestRenderObjectElement() : super(Table());
+
+  @override
+  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
+
+  @override
+  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot) { }
+
+  @override
+  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
 }
 
 class _EmptyWidget extends Widget {

packages/flutter/test/widgets/memory_allocations_test.dart

@@ -66,6 +66,15 @@ class _TestElement extends RootRenderObjectElement{
     mount(null, null);
     deactivate();
   }
+
+  @override
+  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
+
+  @override
+  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot) { }
+
+  @override
+  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
 }
 
 class _TestRenderObject extends RenderObject {

packages/flutter/test/widgets/render_object_element_test.dart

@@ -105,6 +105,15 @@ abstract class SwapperElement extends RenderObjectElement {
     swapper = updateChild(swapper, widget.swapper, swapperIsOnTop);
     swapperIsOnTop = !swapperIsOnTop;
   }
+
+  @override
+  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
+
+  @override
+  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot) { }
+
+  @override
+  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
 }
 
 class SwapperElementWithProperOverrides extends SwapperElement {
@@ -288,26 +297,4 @@ void main() {
     expect(swapper.removeSlots, contains('stable'));
     expect(swapper.removeSlots, contains(false));
   });
-
-  testWidgets('RenderObjectElement *ChildRenderObject methods fail with deprecation message', (WidgetTester tester) async {
-    const Key redKey = ValueKey<String>('red');
-    const Key blueKey = ValueKey<String>('blue');
-    Widget widget() {
-      return SwapperWithNoOverrides(
-        stable: ColoredBox(
-          key: redKey,
-          color: Color(nonconst(0xffff0000)),
-        ),
-        swapper: ColoredBox(
-          key: blueKey,
-          color: Color(nonconst(0xff0000ff)),
-        ),
-      );
-    }
-
-    await tester.pumpWidget(widget());
-    final FlutterError error = tester.takeException() as FlutterError;
-    final ErrorSummary summary = error.diagnostics.first as ErrorSummary;
-    expect(summary.toString(), contains('deprecated'));
-  });
 }

packages/flutter/test_release/widgets/memory_allocations_test.dart

@@ -63,6 +63,15 @@ class _TestElement extends RootRenderObjectElement{
     mount(null, null);
     deactivate();
   }
+
+  @override
+  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
+
+  @override
+  void moveRenderObjectChild(covariant RenderObject child, covariant Object? oldSlot, covariant Object? newSlot) { }
+
+  @override
+  void removeRenderObjectChild(covariant RenderObject child, covariant Object? slot) { }
 }
 
 class _MyStatefulWidget extends StatefulWidget {