Fixed issues from last Flutter update. (#1210)

lib/src/widgets/delegate.dart

@@ -312,7 +312,8 @@ class EditorTextSelectionGestureDetectorBuilder {
   ///  which triggers this callback./lib/src/material/text_field.dart
   @protected
   void onDragSelectionUpdate(
-      DragStartDetails startDetails, DragUpdateDetails updateDetails) {
+      //DragStartDetails startDetails,
+      DragUpdateDetails updateDetails) {
     renderEditor!.extendSelection(updateDetails.globalPosition,
         cause: SelectionChangedCause.drag);
   }

lib/src/widgets/raw_editor.dart

@@ -325,6 +325,8 @@ class RawEditorState extends EditorState
 
   TextDirection get _textDirection => Directionality.of(context);
 
+  void insertContent(KeyboardInsertedContent content) {}
+
   /// Returns the [ContextMenuButtonItem]s representing the buttons in this
   /// platform's default selection menu for [RawEditor].
   ///

lib/src/widgets/text_selection.dart

@@ -713,7 +713,7 @@ class EditorTextSelectionGestureDetector extends StatefulWidget {
   /// The frequency of calls is throttled to avoid excessive text layout
   /// operations in text fields. The throttling is controlled by the constant
   /// [_kDragSelectionUpdateThrottle].
-  final DragSelectionUpdateCallback? onDragSelectionUpdate;
+  final GestureDragUpdateCallback? onDragSelectionUpdate;
 
   /// Called when a mouse that was previously dragging is released.
   final GestureDragEndCallback? onDragSelectionEnd;
@@ -857,7 +857,8 @@ class _EditorTextSelectionGestureDetectorState
     assert(_lastDragUpdateDetails != null);
     if (widget.onDragSelectionUpdate != null) {
       widget.onDragSelectionUpdate!(
-          _lastDragStartDetails!, _lastDragUpdateDetails!);
+          //_lastDragStartDetails!,
+          _lastDragUpdateDetails!);
     }
     _dragUpdateThrottleTimer = null;
     _lastDragUpdateDetails = null;