Fix token usages on Regular Chip and Action Chip (#141701)

The regular chip and the action chip templates were referencing non existent M3 design tokens.

Fixes https://github.com/flutter/flutter/issues/141288

The `ActionChip` doesn't have any visual difference. Even though the template and file changes, the default `labelStyle` color already uses `onSurface`.
For the reviewer, I've changed the `action_chip_test` to expect a color from the colorScheme so that it is more explicit that the color might not be the same as the labelLarge default in the global textTheme, even if for this case the color is the same.

The regular `Chip` does have visual differences, in particular, the label and trailing icon colors, which were not following the specification. In order to fix this, the regular chip now is based from the `filter-chip` spec as described in the linked issue.

## Before

![image](https://github.com/flutter/flutter/assets/22084723/d602ef42-625a-4b5c-b63b-c46cb2070d80)

## After

![image](https://github.com/flutter/flutter/assets/22084723/dddb754f-fd29-4c4c-96cc-e7f508219f12)

dev/tools/gen_defaults/generated/used_tokens.csv

@@ -1,6 +1,7 @@
 Versions used, v0_162, v0_202, v0_158
 md.comp.assist-chip.container.shape,
 md.comp.assist-chip.container.surface-tint-layer.color,
+md.comp.assist-chip.disabled.label-text.color,
 md.comp.assist-chip.elevated.container.elevation,
 md.comp.assist-chip.elevated.container.shadow-color,
 md.comp.assist-chip.elevated.disabled.container.color,
@@ -12,6 +13,7 @@ md.comp.assist-chip.flat.disabled.outline.color,
 md.comp.assist-chip.flat.disabled.outline.opacity,
 md.comp.assist-chip.flat.outline.color,
 md.comp.assist-chip.flat.outline.width,
+md.comp.assist-chip.label-text.color,
 md.comp.assist-chip.label-text.text-style,
 md.comp.assist-chip.with-icon.disabled.icon.color,
 md.comp.assist-chip.with-icon.icon.color,

dev/tools/gen_defaults/lib/action_chip_template.dart

@@ -38,7 +38,11 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   double? get pressElevation => ${elevation("$tokenGroup$elevatedVariant.pressed.container")};
 
   @override
-  TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")};
+  TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")}?.copyWith(
+    color: isEnabled
+      ? ${color("$tokenGroup.label-text.color")}
+      : ${color("$tokenGroup.disabled.label-text.color")},
+  );
 
   @override
   MaterialStateProperty<Color?>? get color =>
@@ -60,10 +64,10 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   Color? get surfaceTintColor => ${colorOrTransparent("$tokenGroup.container.surface-tint-layer.color")};
 
   @override
-  Color? get checkmarkColor => ${color("$tokenGroup.with-icon.selected.icon.color")};
+  Color? get checkmarkColor => null;
 
   @override
-  Color? get deleteIconColor => ${color("$tokenGroup.with-icon.selected.icon.color")};
+  Color? get deleteIconColor => null;
 
   @override
   BorderSide? get side => _chipVariant == _ChipVariant.flat

dev/tools/gen_defaults/lib/chip_template.dart

@@ -10,7 +10,7 @@ class ChipTemplate extends TokenTemplate {
     super.textThemePrefix = '_textTheme.'
   });
 
-  static const String tokenGroup = 'md.comp.assist-chip';
+  static const String tokenGroup = 'md.comp.filter-chip';
   static const String variant = '.flat';
 
   @override
@@ -29,7 +29,11 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   late final TextTheme _textTheme = Theme.of(context).textTheme;
 
   @override
-  TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")};
+  TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")}?.copyWith(
+    color: isEnabled
+      ? ${color("$tokenGroup.unselected.label-text.color")}
+      : ${color("$tokenGroup.disabled.label-text.color")},
+  );
 
   @override
   MaterialStateProperty<Color?>? get color => null; // Subclasses override this getter
@@ -41,21 +45,23 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   Color? get surfaceTintColor => ${colorOrTransparent("$tokenGroup.container.surface-tint-layer.color")};
 
   @override
-  Color? get checkmarkColor => ${color("$tokenGroup.with-icon.selected.icon.color")};
+  Color? get checkmarkColor => null;
 
   @override
-  Color? get deleteIconColor => ${color("$tokenGroup.with-icon.selected.icon.color")};
+  Color? get deleteIconColor => isEnabled
+    ? ${color("$tokenGroup.with-trailing-icon.unselected.trailing-icon.color")}
+    : ${color("$tokenGroup.with-trailing-icon.disabled.trailing-icon.color")};
 
   @override
   BorderSide? get side => isEnabled
-    ? ${border('$tokenGroup$variant.outline')}
-    : ${border('$tokenGroup$variant.disabled.outline')};
+    ? ${border('$tokenGroup$variant.unselected.outline')}
+    : ${border('$tokenGroup$variant.disabled.unselected.outline')};
 
   @override
   IconThemeData? get iconTheme => IconThemeData(
     color: isEnabled
-      ? ${color("$tokenGroup.with-icon.icon.color")}
-      : ${color("$tokenGroup.with-icon.disabled.icon.color")},
+      ? ${color("$tokenGroup.with-leading-icon.unselected.leading-icon.color")}
+      : ${color("$tokenGroup.with-leading-icon.disabled.leading-icon.color")},
     size: ${getToken("$tokenGroup.with-icon.icon.size")},
   );
 

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

@@ -259,7 +259,11 @@ class _ActionChipDefaultsM3 extends ChipThemeData {
   double? get pressElevation => 1.0;
 
   @override
-  TextStyle? get labelStyle => _textTheme.labelLarge;
+  TextStyle? get labelStyle => _textTheme.labelLarge?.copyWith(
+    color: isEnabled
+      ? _colors.onSurface
+      : _colors.onSurface,
+  );
 
   @override
   MaterialStateProperty<Color?>? get color =>

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

@@ -2279,7 +2279,11 @@ class _ChipDefaultsM3 extends ChipThemeData {
   late final TextTheme _textTheme = Theme.of(context).textTheme;
 
   @override
-  TextStyle? get labelStyle => _textTheme.labelLarge;
+  TextStyle? get labelStyle => _textTheme.labelLarge?.copyWith(
+    color: isEnabled
+      ? _colors.onSurfaceVariant
+      : _colors.onSurface,
+  );
 
   @override
   MaterialStateProperty<Color?>? get color => null; // Subclasses override this getter
@@ -2294,7 +2298,9 @@ class _ChipDefaultsM3 extends ChipThemeData {
   Color? get checkmarkColor => null;
 
   @override
-  Color? get deleteIconColor => null;
+  Color? get deleteIconColor => isEnabled
+    ? _colors.onSurfaceVariant
+    : _colors.onSurface;
 
   @override
   BorderSide? get side => isEnabled

packages/flutter/test/material/action_chip_test.dart

@@ -155,7 +155,7 @@ void main() {
     // Test default label style.
     expect(
       getLabelStyle(tester, label).style.color!.value,
-      theme.textTheme.labelLarge!.color!.value,
+      theme.colorScheme.onSurface.value,
     );
 
     Material chipMaterial = getMaterial(tester);
@@ -229,7 +229,7 @@ void main() {
     // Test default label style.
     expect(
       getLabelStyle(tester, label).style.color!.value,
-      theme.textTheme.labelLarge!.color!.value,
+      theme.colorScheme.onSurface.value,
     );
 
     Material chipMaterial = getMaterial(tester);

packages/flutter/test/material/chip_test.dart

@@ -333,7 +333,7 @@ void main() {
     expect(getIconData(tester).size, 18);
 
     TextStyle labelStyle = getLabelStyle(tester, 'Chip A').style;
-    expect(labelStyle.color, textTheme.labelLarge?.color);
+    expect(labelStyle.color, lightTheme.colorScheme.onSurfaceVariant);
     expect(labelStyle.fontFamily, textTheme.labelLarge?.fontFamily);
     expect(labelStyle.fontFamilyFallback, textTheme.labelLarge?.fontFamilyFallback);
     expect(labelStyle.fontFeatures, textTheme.labelLarge?.fontFeatures);
@@ -361,7 +361,7 @@ void main() {
     expect(getIconData(tester).size, 18);
 
     labelStyle = getLabelStyle(tester, 'Chip A').style;
-    expect(labelStyle.color, textTheme.labelLarge?.color);
+    expect(labelStyle.color, darkTheme.colorScheme.onSurfaceVariant);
     expect(labelStyle.fontFamily, textTheme.labelLarge?.fontFamily);
     expect(labelStyle.fontFamilyFallback, textTheme.labelLarge?.fontFamilyFallback);
     expect(labelStyle.fontFeatures, textTheme.labelLarge?.fontFeatures);