Use system color for default icons in GTK

Follow up to https://chromium-review.googlesource.com/c/chromium/src/+/1436948

Change-Id: I553d0a1d50aa764a79b163a8a3a26ab774e4e162
Reviewed-on: https://chromium-review.googlesource.com/c/1440525
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Auto-Submit: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628423}

chrome/browser/ui/libgtkui/native_theme_gtk.cc

@@ -126,7 +126,6 @@ SkColor SkColorFromColorId(ui::NativeTheme::ColorId color_id) {
     case ui::NativeTheme::kColorId_HighlightedMenuItemForegroundColor:
     case ui::NativeTheme::kColorId_FocusedHighlightedMenuItemBackgroundColor:
     case ui::NativeTheme::kColorId_MenuItemAlertBackgroundColor:
-    case ui::NativeTheme::kColorId_DefaultIconColor:
       return ui::NativeTheme::GetInstanceForNativeUi()->GetSystemColor(
           color_id);
 
@@ -322,6 +321,11 @@ SkColor SkColorFromColorId(ui::NativeTheme::ColorId color_id) {
       return fallback_theme->GetSystemColor(color_id);
     }
 
+    case ui::NativeTheme::kColorId_DefaultIconColor:
+      if (GtkVersionCheck(3, 20))
+        return GetFgColor("GtkMenu#menu GtkMenuItem#menuitem #radio");
+      return GetFgColor("GtkMenu#menu GtkMenuItem#menuitem.radio");
+
     case ui::NativeTheme::kColorId_NumColors:
       NOTREACHED();
       break;