Continue the clipBehavior breaking change (#61366)

This follows https://github.com/flutter/flutter/pull/59364 and cl/319911104

FittedBox is still default to hardEdge clip as new FittedBox is added to Google very quickly. Let's first roll other part of changes into Google first.

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

@@ -384,7 +384,7 @@ class CupertinoSliverRefreshControl extends StatefulWidget {
     // dragged widget, hence the use of Overflow.visible.
     return Center(
       child: Stack(
-        overflow: Overflow.visible,
+        clipBehavior: Clip.none,
         children: <Widget>[
           Positioned(
             top: _kActivityIndicatorMargin,

packages/flutter/lib/src/rendering/stack.dart

@@ -268,20 +268,6 @@ enum StackFit {
   passthrough,
 }
 
-// TODO(liyuqian): Deprecate and remove `Overflow` once its usages are removed from Google.
-
-/// Whether overflowing children should be clipped, or their overflow be
-/// visible.
-enum Overflow {
-  /// Overflowing children will be visible.
-  ///
-  /// The visible overflow area will not accept hit testing.
-  visible,
-
-  /// Overflowing children will be clipped to the bounds of their parent.
-  clip,
-}
-
 /// Implements the stack layout algorithm.
 ///
 /// In a stack layout, the children are positioned on top of each other in the

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

@@ -41,7 +41,6 @@ export 'package:flutter/rendering.dart' show
   LayerLink,
   MainAxisAlignment,
   MainAxisSize,
-  Overflow,
   MultiChildLayoutDelegate,
   PaintingContext,
   PointerCancelEvent,
@@ -1485,7 +1484,6 @@ class FittedBox extends SingleChildRenderObjectWidget {
   ///    relative to text direction.
   final AlignmentGeometry alignment;
 
-  // TODO(liyuqian): defaults to [Clip.none] once Google references are updated.
   /// {@macro flutter.widgets.Clip}
   ///
   /// Defaults to [Clip.hardEdge].
@@ -2291,7 +2289,7 @@ class UnconstrainedBox extends SingleChildRenderObjectWidget {
     this.textDirection,
     this.alignment = Alignment.center,
     this.constrainedAxis,
-    this.clipBehavior = Clip.hardEdge,
+    this.clipBehavior = Clip.none,
   }) : assert(alignment != null),
        assert(clipBehavior != null),
        super(key: key, child: child);
@@ -2319,10 +2317,9 @@ class UnconstrainedBox extends SingleChildRenderObjectWidget {
   /// will be retained.
   final Axis? constrainedAxis;
 
-  // TODO(liyuqian): defaults to [Clip.none] once Google references are updated.
   /// {@macro flutter.widgets.Clip}
   ///
-  /// Defaults to [Clip.hardEdge].
+  /// Defaults to [Clip.none].
   final Clip clipBehavior;
 
   @override
@@ -3313,7 +3310,6 @@ class Stack extends MultiChildRenderObjectWidget {
     this.alignment = AlignmentDirectional.topStart,
     this.textDirection,
     this.fit = StackFit.loose,
-    this.overflow = Overflow.clip,
     this.clipBehavior = Clip.hardEdge,
     List<Widget> children = const <Widget>[],
   }) : assert(clipBehavior != null),
@@ -3354,20 +3350,6 @@ class Stack extends MultiChildRenderObjectWidget {
   /// ([StackFit.expand]).
   final StackFit fit;
 
-  // TODO(liyuqian): Deprecate and remove [overflow] once its usages are removed from Google.
-
-  /// Whether overflowing children should be clipped. See [Overflow].
-  ///
-  /// Some children in a stack might overflow its box. When this flag is set to
-  /// [Overflow.clip], children cannot paint outside of the stack's box.
-  ///
-  /// When set to [Overflow.visible], the visible overflow area will not accept
-  /// hit testing.
-  ///
-  /// This overrides [clipBehavior] for now due to a staged roll out without
-  /// breaking Google. We will remove it and only use [clipBehavior] soon.
-  final Overflow overflow;
-
   /// {@macro flutter.widgets.Clip}
   ///
   /// Defaults to [Clip.hardEdge].
@@ -3392,7 +3374,7 @@ class Stack extends MultiChildRenderObjectWidget {
       alignment: alignment,
       textDirection: textDirection ?? Directionality.of(context),
       fit: fit,
-      clipBehavior: overflow == Overflow.visible ? Clip.none : clipBehavior,
+      clipBehavior: clipBehavior,
     );
   }
 
@@ -3403,7 +3385,7 @@ class Stack extends MultiChildRenderObjectWidget {
       ..alignment = alignment
       ..textDirection = textDirection ?? Directionality.of(context)
       ..fit = fit
-      ..clipBehavior = overflow == Overflow.visible ? Clip.none : clipBehavior;
+      ..clipBehavior = clipBehavior;
   }
 
   @override
@@ -3940,7 +3922,7 @@ class Flex extends MultiChildRenderObjectWidget {
     this.textDirection,
     this.verticalDirection = VerticalDirection.down,
     this.textBaseline = TextBaseline.alphabetic,
-    this.clipBehavior = Clip.hardEdge,
+    this.clipBehavior = Clip.none,
     List<Widget> children = const <Widget>[],
   }) : assert(direction != null),
        assert(mainAxisAlignment != null),
@@ -4040,10 +4022,9 @@ class Flex extends MultiChildRenderObjectWidget {
   /// Defaults to [TextBaseline.alphabetic].
   final TextBaseline? textBaseline;
 
-  // TODO(liyuqian): defaults to [Clip.none] once Google references are updated.
   /// {@macro flutter.widgets.Clip}
   ///
-  /// Defaults to [Clip.hardEdge].
+  /// Defaults to [Clip.none].
   final Clip clipBehavior;
 
   bool get _needTextDirection {
@@ -4795,7 +4776,7 @@ class Wrap extends MultiChildRenderObjectWidget {
     this.crossAxisAlignment = WrapCrossAlignment.start,
     this.textDirection,
     this.verticalDirection = VerticalDirection.down,
-    this.clipBehavior = Clip.hardEdge,
+    this.clipBehavior = Clip.none,
     List<Widget> children = const <Widget>[],
   }) : assert(clipBehavior != null), super(key: key, children: children);
 
@@ -4931,10 +4912,9 @@ class Wrap extends MultiChildRenderObjectWidget {
   /// [verticalDirection] must not be null.
   final VerticalDirection verticalDirection;
 
-  // TODO(liyuqian): defaults to [Clip.none] once Google references are updated.
   /// {@macro flutter.widgets.Clip}
   ///
-  /// Defaults to [Clip.hardEdge].
+  /// Defaults to [Clip.none].
   final Clip clipBehavior;
 
   @override

packages/flutter/test/widgets/basic_test.dart

@@ -340,7 +340,7 @@ void main() {
   testWidgets('UnconstrainedBox can set and update clipBehavior', (WidgetTester tester) async {
     await tester.pumpWidget(const UnconstrainedBox());
     final RenderUnconstrainedBox renderObject = tester.allRenderObjects.whereType<RenderUnconstrainedBox>().first;
-    expect(renderObject.clipBehavior, equals(Clip.hardEdge));
+    expect(renderObject.clipBehavior, equals(Clip.none));
 
     await tester.pumpWidget(const UnconstrainedBox(clipBehavior: Clip.antiAlias));
     expect(renderObject.clipBehavior, equals(Clip.antiAlias));

packages/flutter/test/widgets/flex_test.dart

@@ -146,7 +146,7 @@ void main() {
   testWidgets('Can set and update clipBehavior', (WidgetTester tester) async {
     await tester.pumpWidget(Flex(direction: Axis.vertical));
     final RenderFlex renderObject = tester.allRenderObjects.whereType<RenderFlex>().first;
-    expect(renderObject.clipBehavior, equals(Clip.hardEdge));
+    expect(renderObject.clipBehavior, equals(Clip.none));
 
     await tester.pumpWidget(Flex(direction: Axis.vertical, clipBehavior: Clip.antiAlias));
     expect(renderObject.clipBehavior, equals(Clip.antiAlias));

packages/flutter/test/widgets/stack_test.dart

@@ -453,7 +453,6 @@ void main() {
         textDirection: TextDirection.ltr,
         child: Center(
           child: Stack(
-            overflow: Overflow.visible,
             clipBehavior: Clip.none,
             children: const <Widget>[
               SizedBox(

packages/flutter/test/widgets/wrap_test.dart

@@ -902,7 +902,7 @@ void main() {
   testWidgets('Wrap can set and update clipBehavior', (WidgetTester tester) async {
     await tester.pumpWidget(Wrap(textDirection: TextDirection.ltr));
     final RenderWrap renderObject = tester.allRenderObjects.whereType<RenderWrap>().first;
-    expect(renderObject.clipBehavior, equals(Clip.hardEdge));
+    expect(renderObject.clipBehavior, equals(Clip.none));
 
     await tester.pumpWidget(Wrap(textDirection: TextDirection.ltr, clipBehavior: Clip.antiAlias));
     expect(renderObject.clipBehavior, equals(Clip.antiAlias));