Revert "remove usage to applyTextScaleFactorToWidgetSpan (#61636)" (#62144) This reverts commit c816fabd0af48a861afdeb78bb6ebe4b7cbd3707.

diff --git a/packages/flutter/lib/src/rendering/paragraph.dart b/packages/flutter/lib/src/rendering/paragraph.dart
index d407403..c764eac 100644
--- a/packages/flutter/lib/src/rendering/paragraph.dart
+++ b/packages/flutter/lib/src/rendering/paragraph.dart

@@ -79,6 +79,13 @@
     StrutStyle strutStyle,
     TextWidthBasis textWidthBasis = TextWidthBasis.parent,
     ui.TextHeightBehavior textHeightBehavior,
+    @Deprecated(
+      'This parameter is a temporary flag to migrate the internal tests and '
+      'should not be used in other contexts. For more details, please check '
+      'https://github.com/flutter/flutter/issues/59316. '
+      'This feature was deprecated after v1.19.0.'
+    )
+    bool applyTextScaleFactorToWidgetSpan = false,
     List<RenderBox> children,
   }) : assert(text != null),
        assert(text.debugAssertIsValid()),
@@ -91,6 +98,7 @@
        assert(textWidthBasis != null),
        _softWrap = softWrap,
        _overflow = overflow,
+       _applyTextScaleFactorToWidgetSpan = applyTextScaleFactorToWidgetSpan,
        _textPainter = TextPainter(
          text: text,
          textAlign: textAlign,
@@ -290,6 +298,8 @@
     markNeedsLayout();
   }
 
+  final bool _applyTextScaleFactorToWidgetSpan;
+
   @override
   double computeMinIntrinsicWidth(double height) {
     if (!_canComputeIntrinsics()) {
@@ -530,7 +540,8 @@
     // The content will be enlarged by textScaleFactor during painting phase.
     // We reduce constraint by textScaleFactor so that the content will fit
     // into the box once it is enlarged.
-    boxConstraints = boxConstraints / textScaleFactor;
+    if (_applyTextScaleFactorToWidgetSpan)
+      boxConstraints = boxConstraints / textScaleFactor;
     while (child != null) {
       // Only constrain the width to the maximum width of the paragraph.
       // Leave height unconstrained, which will overflow if expanded past.

diff --git a/packages/flutter/lib/src/widgets/basic.dart b/packages/flutter/lib/src/widgets/basic.dart
index 4868f19..5df2211 100644
--- a/packages/flutter/lib/src/widgets/basic.dart
+++ b/packages/flutter/lib/src/widgets/basic.dart

@@ -5200,6 +5200,7 @@
        assert(textScaleFactor != null),
        assert(maxLines == null || maxLines > 0),
        assert(textWidthBasis != null),
+       _applyTextScaleFactorToWidgetSpan = applyTextScaleFactorToWidgetSpan,
        super(key: key, children: _extractChildren(text));
 
   // Traverses the InlineSpan tree and depth-first collects the list of
@@ -5277,6 +5278,8 @@
   /// {@macro flutter.dart:ui.textHeightBehavior}
   final ui.TextHeightBehavior textHeightBehavior;
 
+  final bool _applyTextScaleFactorToWidgetSpan;
+
   @override
   RenderParagraph createRenderObject(BuildContext context) {
     assert(textDirection != null || debugCheckHasDirectionality(context));
@@ -5290,6 +5293,7 @@
       strutStyle: strutStyle,
       textWidthBasis: textWidthBasis,
       textHeightBehavior: textHeightBehavior,
+      applyTextScaleFactorToWidgetSpan: _applyTextScaleFactorToWidgetSpan,
       locale: locale ?? Localizations.localeOf(context, nullOk: true),
     );
   }

diff --git a/packages/flutter/lib/src/widgets/text.dart b/packages/flutter/lib/src/widgets/text.dart
index 1b63929..eb91a7a 100644
--- a/packages/flutter/lib/src/widgets/text.dart
+++ b/packages/flutter/lib/src/widgets/text.dart

@@ -361,6 +361,7 @@
          'A non-null String must be provided to a Text widget.',
        ),
        textSpan = null,
+       _applyTextScaleFactorToWidgetSpan = true,
        super(key: key);
 
   /// Creates a text widget with a [InlineSpan].
@@ -400,6 +401,7 @@
          'A non-null TextSpan must be provided to a Text.rich widget.',
        ),
        data = null,
+       _applyTextScaleFactorToWidgetSpan = applyTextScaleFactorToWidgetSpan,
        super(key: key);
 
   /// The text to display.
@@ -502,6 +504,8 @@
   /// {@macro flutter.dart:ui.textHeightBehavior}
   final ui.TextHeightBehavior textHeightBehavior;
 
+  final bool _applyTextScaleFactorToWidgetSpan;
+
   @override
   Widget build(BuildContext context) {
     final DefaultTextStyle defaultTextStyle = DefaultTextStyle.of(context);
@@ -521,6 +525,7 @@
       strutStyle: strutStyle,
       textWidthBasis: textWidthBasis ?? defaultTextStyle.textWidthBasis,
       textHeightBehavior: textHeightBehavior ?? defaultTextStyle.textHeightBehavior ?? DefaultTextHeightBehavior.of(context),
+      applyTextScaleFactorToWidgetSpan: _applyTextScaleFactorToWidgetSpan,
       text: TextSpan(
         style: effectiveTextStyle,
         text: data,

diff --git a/packages/flutter/test/widgets/text_test.dart b/packages/flutter/test/widgets/text_test.dart
index bb0f969..6467117 100644
--- a/packages/flutter/test/widgets/text_test.dart
+++ b/packages/flutter/test/widgets/text_test.dart

@@ -186,6 +186,7 @@
               key: key,
               textDirection: TextDirection.ltr,
               textScaleFactor: textScaleFactor,
+              applyTextScaleFactorToWidgetSpan: true,
             ),
           ),
         ),
@@ -214,6 +215,7 @@
               key: key,
               textDirection: TextDirection.ltr,
               textScaleFactor: textScaleFactor,
+              applyTextScaleFactorToWidgetSpan: true,
             ),
           ),
         ),