diff --git a/other/thorium-2024-ui.patch b/other/thorium-2024-ui.patch
index 7218715dc..4c1dadd5f 100644
--- a/other/thorium-2024-ui.patch
+++ b/other/thorium-2024-ui.patch
@@ -24,7 +24,7 @@ index bba403a7e5068..e6cba4e30c0a0 100644
        // to the white space above and below.
 -      const int bookmark_bar_attached_vertical_margin =
 -          features::IsChromeRefresh2023() ? 6 : 4;
-+      const int bookmark_bar_attached_vertical_margin = IsThorium2024() ? 2 : 6;
++      const int bookmark_bar_attached_vertical_margin = features::IsThorium2024() ? 2 : 6;
        return GetLayoutConstant(BOOKMARK_BAR_BUTTON_HEIGHT) +
               bookmark_bar_attached_vertical_margin;
      }
@@ -33,13 +33,13 @@ index bba403a7e5068..e6cba4e30c0a0 100644
               GetLayoutConstant(TAB_STRIP_PADDING);
      case TAB_STRIP_PADDING:
 -      return features::IsChromeRefresh2023() ? 6 : 0;
-+      return IsThorium2024() ? 0 : 6;
++      return features::IsThorium2024() ? 0 : 6;
 +    case TAB_MARGIN:
-+      return IsThorium2024() ? 6 : GetLayoutConstant(TAB_STRIP_PADDING);
++      return features::IsThorium2024() ? 6 : GetLayoutConstant(TAB_STRIP_PADDING);
 +    case TAB_INACTIVE_PADDING:
-+      return IsThorium2024() ? 3 : 6;
++      return features::IsThorium2024() ? 3 : 6;
 +    case TAB_SEARCH_PADDING:
-+      return IsThorium2024() ? 4 : 0;
++      return features::IsThorium2024() ? 4 : 0;
      case TAB_SEPARATOR_HEIGHT:
        // TODO (crbug.com/1451400): ChromeRefresh2023 needs different values for
        // this constant.
@@ -48,14 +48,14 @@ index bba403a7e5068..e6cba4e30c0a0 100644
        return 1;
      case TOOLBAR_DIVIDER_HEIGHT:
 -      return touch_ui ? 20 : 16;
-+      if (IsThorium2024()) {
++      if (features::IsThorium2024()) {
 +        return 20;
 +      } else {
 +        return touch_ui ? 20 : 16;
 +      }
      case TOOLBAR_DIVIDER_SPACING:
 -      return 9;
-+      return IsThorium2024() ? 8 : 9;
++      return features::IsThorium2024() ? 8 : 9;
      case TOOLBAR_DIVIDER_WIDTH:
        return 2;
      case TOOLBAR_ELEMENT_PADDING:
@@ -64,7 +64,7 @@ index bba403a7e5068..e6cba4e30c0a0 100644
        }
      case TOOLBAR_STANDARD_SPACING:
 -      if (features::IsChromeRefresh2023()) {
-+      if (features::IsChromeRefresh2023() && !IsThorium2024()) {
++      if (features::IsChromeRefresh2023() && !features::IsThorium2024()) {
          return touch_ui ? 12 : 9;
        } else {
          return touch_ui ? 12 : 8;
@@ -73,7 +73,7 @@ index bba403a7e5068..e6cba4e30c0a0 100644
        return features::IsChromeRefresh2023() ? 20 : 16;
      case TOOLBAR_CORNER_RADIUS:
 -      return 8;
-+      return IsThorium2024() ? 0 : 8;
++      return features::IsThorium2024() ? 0 : 8;
      default:
        break;
    }
@@ -152,9 +152,9 @@ index aa9cd30374311..5d5a40f92f922 100644
 -  return 10;
 +  static const bool rectangular_tabs =
 +      base::CommandLine::ForCurrentProcess()->HasSwitch("rectangular-tabs");
-+  if (IsThorium2024() && !rectangular_tabs) {
++  if (features::IsThorium2024() && !rectangular_tabs) {
 +    return 8;
-+  } else if ((rectangular_tabs && IsThorium2024()) || (rectangular_tabs && !IsThorium2024())) {
++  } else if ((rectangular_tabs && features::IsThorium2024()) || (rectangular_tabs && !features::IsThorium2024())) {
 +    return 3;
 +  } else {
 +    return 10;
@@ -165,9 +165,9 @@ index aa9cd30374311..5d5a40f92f922 100644
 -  return 12;
 +  static const bool rectangular_tabs =
 +      base::CommandLine::ForCurrentProcess()->HasSwitch("rectangular-tabs");
-+  if (IsThorium2024() && !rectangular_tabs) {
++  if (features::IsThorium2024() && !rectangular_tabs) {
 +    return 10;
-+  } else if ((rectangular_tabs && IsThorium2024()) || (rectangular_tabs && !IsThorium2024())) {
++  } else if ((rectangular_tabs && features::IsThorium2024()) || (rectangular_tabs && !features::IsThorium2024())) {
 +    return 3;
 +  } else {
 +    return 12;
@@ -181,7 +181,7 @@ index aa9cd30374311..5d5a40f92f922 100644
  gfx::Size ChromeRefresh2023TabStyle::GetSeparatorSize() const {
 -  return gfx::Size(kChromeRefreshSeparatorThickness,
 -                   kChromeRefreshSeparatorHeight);
-+  if (IsThorium2024()) {
++  if (features::IsThorium2024()) {
 +    return gfx::Size(kThoriumSeparatorThickness,
 +                     kThoriumSeparatorHeight);
 +  } else {
@@ -196,7 +196,7 @@ index aa9cd30374311..5d5a40f92f922 100644
 -      GetBottomCornerRadius() + kChromeRefreshTabHorizontalPadding,
 -      kChromeRefreshTabVerticalPadding + GetLayoutConstant(TAB_STRIP_PADDING),
 -      GetBottomCornerRadius() + kChromeRefreshTabHorizontalPadding);
-+  if (IsThorium2024()) {
++  if (features::IsThorium2024()) {
 +    return gfx::Insets::TLBR(
 +        kThoriumTabVerticalPadding + GetLayoutConstant(TAB_STRIP_PADDING),
 +        GetBottomCornerRadius() + kThoriumTabHorizontalPadding,
@@ -216,7 +216,7 @@ index aa9cd30374311..5d5a40f92f922 100644
 -                           kChromeRefreshSeparatorHorizontalMargin,
 -                           GetLayoutConstant(TAB_STRIP_PADDING),
 -                           kChromeRefreshSeparatorHorizontalMargin);
-+  if (IsThorium2024()) {
++  if (features::IsThorium2024()) {
 +    return gfx::Insets::TLBR(GetLayoutConstant(TAB_INACTIVE_PADDING),
 +                             kThoriumSeparatorHorizontalMargin,
 +                             GetLayoutConstant(TAB_INACTIVE_PADDING),
@@ -341,15 +341,15 @@ index 83c7f06f1b236..576150ff56af4 100644
    menu_horizontal_border_size = 0;
    submenu_horizontal_overlap = 0;
 -  item_vertical_margin = 6;
-+  item_vertical_margin = IsThorium2024() ? 4 : 6;
++  item_vertical_margin = features::IsThorium2024() ? 4 : 6;
    item_horizontal_border_padding = 12;
    arrow_size = 16;
 -  separator_height = 17;
 -  separator_spacing_height = 4;
 -  use_outer_border = false;
-+  separator_height = IsThorium2024() ? 11 : 17;
-+  separator_spacing_height = IsThorium2024() ? 3 : 4;
-+  use_outer_border = IsThorium2024() ? true : false;
++  separator_height = features::IsThorium2024() ? 11 : 17;
++  separator_spacing_height = features::IsThorium2024() ? 3 : 4;
++  use_outer_border = features::IsThorium2024() ? true : false;
  }
  
  // static
@@ -376,7 +376,7 @@ index 3684e27766834..d62fe3f96ab62 100644
  int LayoutProvider::GetCornerRadiusMetric(ShapeContextTokens id,
                                            const gfx::Size& size) const {
 +
-+  if (IsThorium2024()) {
++  if (features::IsThorium2024()) {
 +    switch (id) {
 +      case ShapeContextTokens::kBadgeRadius:
 +        return 4;
diff --git a/src/chrome/browser/ui/views/tabs/tab_style_views.cc b/src/chrome/browser/ui/views/tabs/tab_style_views.cc
index e98a3bd45..9090165ea 100644
--- a/src/chrome/browser/ui/views/tabs/tab_style_views.cc
+++ b/src/chrome/browser/ui/views/tabs/tab_style_views.cc
@@ -1240,7 +1240,7 @@ SkPath ChromeRefresh2023TabStyleViews::GetPath(
       }
     }
 
-    if (Th24State()) {
+    if (features::IsThorium2024()) {
       top -= tab()->controller()->Th24StrokeOffset();
       // Experimental int
       //bottom -= tab()->controller()->Th24StrokeOffset();
diff --git a/src/ui/base/ui_base_features.cc b/src/ui/base/ui_base_features.cc
index 4d067c825..e0fe5aed3 100644
--- a/src/ui/base/ui_base_features.cc
+++ b/src/ui/base/ui_base_features.cc
@@ -520,7 +520,7 @@ bool IsChromeWebuiRefresh2023() {
          base::FeatureList::IsEnabled(kChromeRefreshSecondary2023);
 }
 
-BASE_FEATURE(kThorium2024
+BASE_FEATURE(kThorium2024,
              "Thorium2024",
              base::FEATURE_DISABLED_BY_DEFAULT);