Clean up some NativeTheme code.

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index 51d246f0a3fdd6fe91bdc5a351f06909c558287b..b6cd9d0e97f9345128f754a62f0b80e15fa2430f 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -870,14 +870,7 @@ const ui::NativeTheme* View::GetNativeTheme() const {
   if (widget)
     return widget->GetNativeTheme();
 
-#if defined(OS_WIN)
-  // On Windows, ui::NativeTheme::GetInstanceForWeb() returns NativeThemeWinAura
-  // because that's what the renderer wants, but Views should default to
-  // NativeThemeWin. TODO(estade): clean this up, see http://crbug.com/558029
-  return ui::NativeThemeWin::instance();
-#else
-  return ui::NativeTheme::GetInstanceForWeb();
-#endif
+  return ui::NativeTheme::GetInstanceForNativeUi();
 }
 
 // RTL painting ----------------------------------------------------------------