diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 8a709cb..944d85d 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-7c34dfafc9acece1a9438f206bfbb0a9bedba3bf
+6921873c71e700235c0f68f0359be2332f93c8bc
diff --git a/packages/flutter/lib/src/rendering/custom_paint.dart b/packages/flutter/lib/src/rendering/custom_paint.dart
index 6c5bc6e..b66659c 100644
--- a/packages/flutter/lib/src/rendering/custom_paint.dart
+++ b/packages/flutter/lib/src/rendering/custom_paint.dart
@@ -859,6 +859,15 @@
     if (properties.onDecrease != null) {
       config.onDecrease = properties.onDecrease;
     }
+    if (properties.onCopy != null) {
+      config.onCopy = properties.onCopy;
+    }
+    if (properties.onCut != null) {
+      config.onCut = properties.onCut;
+    }
+    if (properties.onPaste != null) {
+      config.onPaste = properties.onPaste;
+    }
     if (properties.onMoveCursorForwardByCharacter != null) {
       config.onMoveCursorForwardByCharacter = properties.onMoveCursorForwardByCharacter;
     }
diff --git a/packages/flutter/lib/src/rendering/proxy_box.dart b/packages/flutter/lib/src/rendering/proxy_box.dart
index ab16133..5e42bbb 100644
--- a/packages/flutter/lib/src/rendering/proxy_box.dart
+++ b/packages/flutter/lib/src/rendering/proxy_box.dart
@@ -3015,6 +3015,9 @@
     VoidCallback onScrollDown,
     VoidCallback onIncrease,
     VoidCallback onDecrease,
+    VoidCallback onCopy,
+    VoidCallback onCut,
+    VoidCallback onPaste,
     MoveCursorHandler onMoveCursorForwardByCharacter,
     MoveCursorHandler onMoveCursorBackwardByCharacter,
     SetSelectionHandler onSetSelection,
@@ -3039,6 +3042,9 @@
        _onScrollDown = onScrollDown,
        _onIncrease = onIncrease,
        _onDecrease = onDecrease,
+       _onCopy = onCopy,
+       _onCut = onCut,
+       _onPaste = onPaste,
        _onMoveCursorForwardByCharacter = onMoveCursorForwardByCharacter,
        _onMoveCursorBackwardByCharacter = onMoveCursorBackwardByCharacter,
        _onSetSelection = onSetSelection,
@@ -3365,6 +3371,58 @@
       markNeedsSemanticsUpdate();
   }
 
+  /// The handler for [SemanticsAction.copy].
+  ///
+  /// This is a request to copy the current selection to the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onCopy => _onCopy;
+  VoidCallback _onCopy;
+  set onCopy(VoidCallback handler) {
+    if (_onCopy == handler)
+      return;
+    final bool hadValue = _onCopy != null;
+    _onCopy = handler;
+    if ((handler != null) != hadValue)
+      markNeedsSemanticsUpdate();
+  }
+
+  /// The handler for [SemanticsAction.cut].
+  ///
+  /// This is a request to cut the current selection and place it in the
+  /// clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onCut => _onCut;
+  VoidCallback _onCut;
+  set onCut(VoidCallback handler) {
+    if (_onCut == handler)
+      return;
+    final bool hadValue = _onCut != null;
+    _onCut = handler;
+    if ((handler != null) != hadValue)
+      markNeedsSemanticsUpdate();
+  }
+
+  /// The handler for [SemanticsAction.paste].
+  ///
+  /// This is a request to paste the current content of the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onPaste => _onPaste;
+  VoidCallback _onPaste;
+  set onPaste(VoidCallback handler) {
+    if (_onPaste == handler)
+      return;
+    final bool hadValue = _onPaste != null;
+    _onPaste = handler;
+    if ((handler != null) != hadValue)
+      markNeedsSemanticsUpdate();
+  }
+
   /// The handler for [SemanticsAction.onMoveCursorForwardByCharacter].
   ///
   /// This handler is invoked when the user wants to move the cursor in a
@@ -3464,6 +3522,12 @@
       config.onIncrease = _performIncrease;
     if (onDecrease != null)
       config.onDecrease = _performDecrease;
+    if (onCopy != null)
+      config.onCopy = _performCopy;
+    if (onCut != null)
+      config.onCut = _performCut;
+    if (onPaste != null)
+      config.onPaste = _performPaste;
     if (onMoveCursorForwardByCharacter != null)
       config.onMoveCursorForwardByCharacter = _performMoveCursorForwardByCharacter;
     if (onMoveCursorBackwardByCharacter != null)
@@ -3512,6 +3576,21 @@
       onDecrease();
   }
 
+  void _performCopy() {
+    if (onCopy != null)
+      onCopy();
+  }
+
+  void _performCut() {
+    if (onCut != null)
+      onCut();
+  }
+
+  void _performPaste() {
+    if (onPaste != null)
+      onPaste();
+  }
+
   void _performMoveCursorForwardByCharacter(bool extendSelection) {
     if (onMoveCursorForwardByCharacter != null)
       onMoveCursorForwardByCharacter(extendSelection);
diff --git a/packages/flutter/lib/src/semantics/semantics.dart b/packages/flutter/lib/src/semantics/semantics.dart
index 652aa95..31c5d26 100644
--- a/packages/flutter/lib/src/semantics/semantics.dart
+++ b/packages/flutter/lib/src/semantics/semantics.dart
@@ -277,6 +277,9 @@
     this.onScrollDown,
     this.onIncrease,
     this.onDecrease,
+    this.onCopy,
+    this.onCut,
+    this.onPaste,
     this.onMoveCursorForwardByCharacter,
     this.onMoveCursorBackwardByCharacter,
     this.onSetSelection,
@@ -472,6 +475,31 @@
   /// volume down button.
   final VoidCallback onDecrease;
 
+  /// The handler for [SemanticsAction.copy].
+  ///
+  /// This is a request to copy the current selection to the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  final VoidCallback onCopy;
+
+  /// The handler for [SemanticsAction.cut].
+  ///
+  /// This is a request to cut the current selection and place it in the
+  /// clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  final VoidCallback onCut;
+
+  /// The handler for [SemanticsAction.paste].
+  ///
+  /// This is a request to paste the current content of the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  final VoidCallback onPaste;
+
   /// The handler for [SemanticsAction.onMoveCursorForwardByCharacter].
   ///
   /// This handler is invoked when the user wants to move the cursor in a
@@ -1618,6 +1646,46 @@
     _onDecrease = value;
   }
 
+  /// The handler for [SemanticsAction.copy].
+  ///
+  /// This is a request to copy the current selection to the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onCopy => _onCopy;
+  VoidCallback _onCopy;
+  set onCopy(VoidCallback value) {
+    _addArgumentlessAction(SemanticsAction.copy, value);
+    _onCopy = value;
+  }
+
+  /// The handler for [SemanticsAction.cut].
+  ///
+  /// This is a request to cut the current selection and place it in the
+  /// clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onCut => _onCut;
+  VoidCallback _onCut;
+  set onCut(VoidCallback value) {
+    _addArgumentlessAction(SemanticsAction.cut, value);
+    _onCut = value;
+  }
+
+  /// The handler for [SemanticsAction.paste].
+  ///
+  /// This is a request to paste the current content of the clipboard.
+  ///
+  /// TalkBack users on Android can trigger this action from the local context
+  /// menu of a text field, for example.
+  VoidCallback get onPaste => _onPaste;
+  VoidCallback _onPaste;
+  set onPaste(VoidCallback value) {
+    _addArgumentlessAction(SemanticsAction.paste, value);
+    _onPaste = value;
+  }
+
   /// The handler for [SemanticsAction.showOnScreen].
   ///
   /// A request to fully show the semantics node on screen. For example, this
diff --git a/packages/flutter/lib/src/widgets/basic.dart b/packages/flutter/lib/src/widgets/basic.dart
index 1a7bff7..bbacf10 100644
--- a/packages/flutter/lib/src/widgets/basic.dart
+++ b/packages/flutter/lib/src/widgets/basic.dart
@@ -4852,6 +4852,9 @@
     VoidCallback onScrollDown,
     VoidCallback onIncrease,
     VoidCallback onDecrease,
+    VoidCallback onCopy,
+    VoidCallback onCut,
+    VoidCallback onPaste,
     MoveCursorHandler onMoveCursorForwardByCharacter,
     MoveCursorHandler onMoveCursorBackwardByCharacter,
     SetSelectionHandler onSetSelection,
@@ -4879,6 +4882,9 @@
       onScrollDown: onScrollDown,
       onIncrease: onIncrease,
       onDecrease: onDecrease,
+      onCopy: onCopy,
+      onCut: onCut,
+      onPaste: onPaste,
       onMoveCursorForwardByCharacter: onMoveCursorForwardByCharacter,
       onMoveCursorBackwardByCharacter: onMoveCursorBackwardByCharacter,
       onSetSelection: onSetSelection,
@@ -4948,6 +4954,9 @@
       onScrollDown: properties.onScrollDown,
       onIncrease: properties.onIncrease,
       onDecrease: properties.onDecrease,
+      onCopy: properties.onCopy,
+      onCut: properties.onCut,
+      onPaste: properties.onPaste,
       onMoveCursorForwardByCharacter: properties.onMoveCursorForwardByCharacter,
       onMoveCursorBackwardByCharacter: properties.onMoveCursorBackwardByCharacter,
       onSetSelection: properties.onSetSelection,
@@ -4988,6 +4997,9 @@
       ..onScrollDown = properties.onScrollDown
       ..onIncrease = properties.onIncrease
       ..onDecrease = properties.onDecrease
+      ..onCopy = properties.onCopy
+      ..onCut = properties.onCut
+      ..onPaste = properties.onPaste
       ..onMoveCursorForwardByCharacter = properties.onMoveCursorForwardByCharacter
       ..onMoveCursorBackwardByCharacter = properties.onMoveCursorForwardByCharacter
       ..onSetSelection = properties.onSetSelection;
diff --git a/packages/flutter/test/widgets/semantics_test.dart b/packages/flutter/test/widgets/semantics_test.dart
index 7e42e49..b860e0c 100644
--- a/packages/flutter/test/widgets/semantics_test.dart
+++ b/packages/flutter/test/widgets/semantics_test.dart
@@ -392,6 +392,9 @@
         onScrollDown: () => performedActions.add(SemanticsAction.scrollDown),
         onIncrease: () => performedActions.add(SemanticsAction.increase),
         onDecrease: () => performedActions.add(SemanticsAction.decrease),
+        onCopy: () => performedActions.add(SemanticsAction.copy),
+        onCut: () => performedActions.add(SemanticsAction.cut),
+        onPaste: () => performedActions.add(SemanticsAction.paste),
         onMoveCursorForwardByCharacter: (bool _) => performedActions.add(SemanticsAction.moveCursorForwardByCharacter),
         onMoveCursorBackwardByCharacter: (bool _) => performedActions.add(SemanticsAction.moveCursorBackwardByCharacter),
         onSetSelection: (TextSelection _) => performedActions.add(SemanticsAction.setSelection),