Try to get rid of all direct references to particular native themes.

chrome/browser/ui/views/frame/browser_view.cc

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index 59b92742aad928962c2304761d59d0be57917df2..e3c5abf2d1b8dbd5ba4699057473363ed6ae3c78 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -1908,11 +1908,10 @@ void BrowserView::OnThemeChanged() {
     base::AutoReset<bool> reset(&handling_theme_changed_, true);
 #if defined(OS_WIN)
     ui::NativeThemeDarkWin::instance()->NotifyObservers();
-    ui::NativeThemeWin::instance()->NotifyObservers();
 #elif defined(OS_LINUX)
     ui::NativeThemeDarkAura::instance()->NotifyObservers();
-    ui::NativeThemeAura::instance()->NotifyObservers();
 #endif
+    ui::NativeTheme::GetInstanceForNativeUi()->NotifyObservers();
   }
 
   views::View::OnThemeChanged();