Remove deprecated `errorColor` from `ThemeData` (#144078)

This PR is to remove deprecated `ThemeData.errorColor`.

These parameters are made obsolete in https://github.com/flutter/flutter/pull/110162.
Part of https://github.com/flutter/flutter/issues/143956

packages/flutter/lib/src/material/theme_data.dart

@@ -366,12 +366,6 @@ class ThemeData with Diagnosticable {
     TimePickerThemeData? timePickerTheme,
     ToggleButtonsThemeData? toggleButtonsTheme,
     TooltipThemeData? tooltipTheme,
-    // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'Use colorScheme.error instead. '
-      'This feature was deprecated after v3.3.0-0.5.pre.',
-    )
-    Color? errorColor,
   }) {
     // GENERAL CONFIGURATION
     cupertinoOverrideTheme = cupertinoOverrideTheme?.noDefault();
@@ -428,7 +422,6 @@ class ThemeData with Diagnosticable {
       dividerColor ??= colorScheme.outline;
       dialogBackgroundColor ??= colorScheme.background;
       indicatorColor ??= onPrimarySurfaceColor;
-      errorColor ??= colorScheme.error;
       applyElevationOverlayColor ??= brightness == Brightness.dark;
     }
     applyElevationOverlayColor ??= false;
@@ -545,9 +538,6 @@ class ThemeData with Diagnosticable {
     timePickerTheme ??= const TimePickerThemeData();
     toggleButtonsTheme ??= const ToggleButtonsThemeData();
     tooltipTheme ??= const TooltipThemeData();
-
-    // DEPRECATED (newest deprecations at the bottom)
-    errorColor ??= Colors.red[700]!;
     return ThemeData.raw(
       // For the sanity of the reader, make sure these properties are in the same
       // order in every place that they are separated by section comments (e.g.
@@ -640,8 +630,6 @@ class ThemeData with Diagnosticable {
       timePickerTheme: timePickerTheme,
       toggleButtonsTheme: toggleButtonsTheme,
       tooltipTheme: tooltipTheme,
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: errorColor,
     );
   }
 
@@ -747,18 +735,7 @@ class ThemeData with Diagnosticable {
     required this.timePickerTheme,
     required this.toggleButtonsTheme,
     required this.tooltipTheme,
-    // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'Use colorScheme.error instead. '
-      'This feature was deprecated after v3.3.0-0.5.pre.',
-    )
-    Color? errorColor,
-
-  }) : // DEPRECATED (newest deprecations at the bottom)
-       // should not be `required`, use getter pattern to avoid breakages.
-       _errorColor = errorColor,
-        // DEPRECATED (newest deprecations at the bottom)
-       assert(errorColor != null);
+  });
 
   /// Create a [ThemeData] based on the colors in the given [colorScheme] and
   /// text styles of the optional [textTheme].
@@ -807,7 +784,6 @@ class ThemeData with Diagnosticable {
       dividerColor: colorScheme.onSurface.withOpacity(0.12),
       dialogBackgroundColor: colorScheme.background,
       indicatorColor: onPrimarySurfaceColor,
-      errorColor: colorScheme.error,
       textTheme: textTheme,
       applyElevationOverlayColor: isDark,
       useMaterial3: useMaterial3,
@@ -1414,17 +1390,6 @@ class ThemeData with Diagnosticable {
   /// This is the value returned from [TooltipTheme.of].
   final TooltipThemeData tooltipTheme;
 
-  // DEPRECATED (newest deprecations at the bottom)
-
-  /// Obsolete property that was used for input validation errors, e.g. in
-  /// [TextField] fields. Use [ColorScheme.error] instead.
-  @Deprecated(
-    'Use colorScheme.error instead. '
-    'This feature was deprecated after v3.3.0-0.5.pre.',
-  )
-  Color get errorColor => _errorColor!;
-  final Color? _errorColor;
-
   /// Creates a copy of this theme but with the given fields replaced with the new values.
   ///
   /// The [brightness] value is applied to the [colorScheme].
@@ -1524,11 +1489,6 @@ class ThemeData with Diagnosticable {
     ToggleButtonsThemeData? toggleButtonsTheme,
     TooltipThemeData? tooltipTheme,
     // DEPRECATED (newest deprecations at the bottom)
-    @Deprecated(
-      'Use colorScheme.error instead. '
-      'This feature was deprecated after v3.3.0-0.5.pre.',
-    )
-    Color? errorColor,
     @Deprecated(
       'Use a ThemeData constructor (.from, .light, or .dark) instead. '
       'These constructors all have a useMaterial3 argument, '
@@ -1633,8 +1593,6 @@ class ThemeData with Diagnosticable {
       timePickerTheme: timePickerTheme ?? this.timePickerTheme,
       toggleButtonsTheme: toggleButtonsTheme ?? this.toggleButtonsTheme,
       tooltipTheme: tooltipTheme ?? this.tooltipTheme,
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: errorColor ?? _errorColor,
     );
   }
 
@@ -1828,8 +1786,6 @@ class ThemeData with Diagnosticable {
       timePickerTheme: TimePickerThemeData.lerp(a.timePickerTheme, b.timePickerTheme, t),
       toggleButtonsTheme: ToggleButtonsThemeData.lerp(a.toggleButtonsTheme, b.toggleButtonsTheme, t)!,
       tooltipTheme: TooltipThemeData.lerp(a.tooltipTheme, b.tooltipTheme, t)!,
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: Color.lerp(a.errorColor, b.errorColor, t),
     );
   }
 
@@ -1929,9 +1885,7 @@ class ThemeData with Diagnosticable {
         other.textSelectionTheme == textSelectionTheme &&
         other.timePickerTheme == timePickerTheme &&
         other.toggleButtonsTheme == toggleButtonsTheme &&
-        other.tooltipTheme == tooltipTheme &&
-        // DEPRECATED (newest deprecations at the bottom)
-        other.errorColor == errorColor;
+        other.tooltipTheme == tooltipTheme;
   }
 
   @override
@@ -2030,8 +1984,6 @@ class ThemeData with Diagnosticable {
       timePickerTheme,
       toggleButtonsTheme,
       tooltipTheme,
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor,
     ];
     return Object.hashAll(values);
   }
@@ -2131,8 +2083,6 @@ class ThemeData with Diagnosticable {
     properties.add(DiagnosticsProperty<TimePickerThemeData>('timePickerTheme', timePickerTheme, defaultValue: defaultData.timePickerTheme, level: DiagnosticLevel.debug));
     properties.add(DiagnosticsProperty<ToggleButtonsThemeData>('toggleButtonsTheme', toggleButtonsTheme, level: DiagnosticLevel.debug));
     properties.add(DiagnosticsProperty<TooltipThemeData>('tooltipTheme', tooltipTheme, level: DiagnosticLevel.debug));
-    // DEPRECATED (newest deprecations at the bottom)
-    properties.add(ColorProperty('errorColor', errorColor, defaultValue: defaultData.errorColor, level: DiagnosticLevel.debug));
   }
 }
 

packages/flutter/test/material/snack_bar_test.dart

@@ -640,7 +640,6 @@ void main() {
       dialogBackgroundColor: Colors.black,
       indicatorColor: Colors.black,
       hintColor: Colors.black,
-      errorColor: Colors.black,
       textTheme: ThemeData.dark().textTheme,
       primaryTextTheme: ThemeData.dark().textTheme,
       inputDecorationTheme: ThemeData.dark().inputDecorationTheme.copyWith(border: const OutlineInputBorder()),

packages/flutter/test/material/theme_data_test.dart

@@ -196,7 +196,6 @@ void main() {
     expect(theme.dividerColor, theme.colorScheme.outline);
     expect(theme.dialogBackgroundColor, theme.colorScheme.background);
     expect(theme.indicatorColor, theme.colorScheme.onPrimary);
-    expect(theme.errorColor, theme.colorScheme.error);
     expect(theme.applyElevationOverlayColor, false);
   });
 
@@ -264,7 +263,6 @@ void main() {
     expect(theme.dividerColor, theme.colorScheme.outline);
     expect(theme.dialogBackgroundColor, theme.colorScheme.background);
     expect(theme.indicatorColor, theme.colorScheme.onSurface);
-    expect(theme.errorColor, theme.colorScheme.error);
     expect(theme.applyElevationOverlayColor, true);
   });
 
@@ -327,7 +325,6 @@ void main() {
     expect(theme.dividerColor, theme.colorScheme.outline);
     expect(theme.dialogBackgroundColor, theme.colorScheme.background);
     expect(theme.indicatorColor, theme.colorScheme.onPrimary);
-    expect(theme.errorColor, theme.colorScheme.error);
     expect(theme.applyElevationOverlayColor, false);
   });
 
@@ -391,7 +388,6 @@ void main() {
     expect(theme.dividerColor, theme.colorScheme.outline);
     expect(theme.dialogBackgroundColor, theme.colorScheme.background);
     expect(theme.indicatorColor, theme.colorScheme.onPrimary);
-    expect(theme.errorColor, theme.colorScheme.error);
     expect(theme.applyElevationOverlayColor, false);
   });
 
@@ -454,7 +450,6 @@ void main() {
     expect(theme.dividerColor, theme.colorScheme.outline);
     expect(theme.dialogBackgroundColor, theme.colorScheme.background);
     expect(theme.indicatorColor, theme.colorScheme.onSurface);
-    expect(theme.errorColor, theme.colorScheme.error);
     expect(theme.applyElevationOverlayColor, true);
   });
 
@@ -468,7 +463,6 @@ void main() {
     expect(theme.canvasColor, equals(lightColors.background));
     expect(theme.scaffoldBackgroundColor, equals(lightColors.background));
     expect(theme.dialogBackgroundColor, equals(lightColors.background));
-    expect(theme.errorColor, equals(lightColors.error));
     expect(theme.applyElevationOverlayColor, isFalse);
   });
 
@@ -483,7 +477,6 @@ void main() {
     expect(theme.canvasColor, equals(darkColors.background));
     expect(theme.scaffoldBackgroundColor, equals(darkColors.background));
     expect(theme.dialogBackgroundColor, equals(darkColors.background));
-    expect(theme.errorColor, equals(darkColors.error));
     expect(theme.applyElevationOverlayColor, isTrue);
   });
 
@@ -894,8 +887,6 @@ void main() {
       timePickerTheme: const TimePickerThemeData(backgroundColor: Colors.black),
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.black)),
       tooltipTheme: const TooltipThemeData(height: 100),
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: Colors.black,
     );
 
     final SliderThemeData otherSliderTheme = SliderThemeData.fromPrimaryColors(
@@ -1010,9 +1001,6 @@ void main() {
       timePickerTheme: const TimePickerThemeData(backgroundColor: Colors.white),
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.white)),
       tooltipTheme: const TooltipThemeData(height: 100),
-
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: Colors.white,
     );
 
     final ThemeData themeDataCopy = theme.copyWith(
@@ -1108,9 +1096,6 @@ void main() {
       timePickerTheme: otherTheme.timePickerTheme,
       toggleButtonsTheme: otherTheme.toggleButtonsTheme,
       tooltipTheme: otherTheme.tooltipTheme,
-
-      // DEPRECATED (newest deprecations at the bottom)
-      errorColor: otherTheme.errorColor,
     );
 
     // For the sanity of the reader, make sure these properties are in the same
@@ -1207,9 +1192,6 @@ void main() {
     expect(themeDataCopy.timePickerTheme, equals(otherTheme.timePickerTheme));
     expect(themeDataCopy.toggleButtonsTheme, equals(otherTheme.toggleButtonsTheme));
     expect(themeDataCopy.tooltipTheme, equals(otherTheme.tooltipTheme));
-
-    // DEPRECATED (newest deprecations at the bottom)
-    expect(themeDataCopy.errorColor, equals(otherTheme.errorColor));
   });
 
   testWidgets('ThemeData.toString has less than 200 characters output', (WidgetTester tester) async {
@@ -1244,7 +1226,6 @@ void main() {
     expect(theme.canvasColor, equals(lightColors.background));
     expect(theme.scaffoldBackgroundColor, equals(lightColors.background));
     expect(theme.dialogBackgroundColor, equals(lightColors.background));
-    expect(theme.errorColor, equals(lightColors.error));
     expect(theme.applyElevationOverlayColor, isFalse);
   });
 
@@ -1337,8 +1318,6 @@ void main() {
       'timePickerTheme',
       'toggleButtonsTheme',
       'tooltipTheme',
-      // DEPRECATED (newest deprecations at the bottom)
-      'errorColor',
     };
 
     final DiagnosticPropertiesBuilder properties = DiagnosticPropertiesBuilder();