3 files changed, 18 insertions, 3 deletions
diff --git a/views/widget/native_widget_gtk.cc b/views/widget/native_widget_gtk.cc
index 801a8ec..4d3c3a4 100644
--- a/views/widget/native_widget_gtk.cc
+++ b/views/widget/native_widget_gtk.cc
@@ -180,6 +180,18 @@ void RemoveExposeHandlerIfExists(GtkWidget* widget) {
   }
 }
 
+GtkWindowType WindowTypeToGtkWindowType(Widget::InitParams::Type type) {
+  switch (type) {
+    case Widget::InitParams::TYPE_WINDOW:
+    case Widget::InitParams::TYPE_WINDOW_FRAMELESS:
+      return GTK_WINDOW_TOPLEVEL;
+    default:
+      return GTK_WINDOW_POPUP;
+  }
+  NOTREACHED();
+  return GTK_WINDOW_TOPLEVEL;
+}
+
 }  // namespace
 
 // During drag and drop GTK sends a drag-leave during a drop. This means we
@@ -1676,9 +1688,7 @@ void NativeWidgetGtk::CreateGtkWidget(const Widget::InitParams& params) {
     }
   } else {
     // Use our own window class to override GtkWindow's move_focus method.
-    widget_ = gtk_views_window_new(
-        params.type == Widget::InitParams::TYPE_WINDOW ? GTK_WINDOW_TOPLEVEL
-                                                       : GTK_WINDOW_POPUP);
+    widget_ = gtk_views_window_new(WindowTypeToGtkWindowType(params.type));
     gtk_widget_set_name(widget_, "views-gtkwidget-window");
     if (transient_to_parent_) {
       gtk_window_set_transient_for(GTK_WINDOW(widget_),
diff --git a/views/widget/native_widget_win.cc b/views/widget/native_widget_win.cc
index fe4d885..6d77bc6 100644
--- a/views/widget/native_widget_win.cc
+++ b/views/widget/native_widget_win.cc
@@ -1783,6 +1783,9 @@ void NativeWidgetWin::SetInitParams(const Widget::InitParams& params) {
     case Widget::InitParams::TYPE_WINDOW:
     case Widget::InitParams::TYPE_CONTROL:
       break;
+    case Widget::InitParams::TYPE_WINDOW_FRAMELESS:
+      style |= WS_POPUP;
+      break;
     case Widget::InitParams::TYPE_POPUP:
       style |= WS_POPUP;
       ex_style |= WS_EX_TOOLWINDOW;
diff --git a/views/widget/widget.h b/views/widget/widget.h
index b2699de..990d060 100644
--- a/views/widget/widget.h
+++ b/views/widget/widget.h
@@ -94,6 +94,8 @@ class Widget : public internal::NativeWidgetDelegate,
   struct InitParams {
     enum Type {
       TYPE_WINDOW,      // A Window, like a frame window.
+      TYPE_WINDOW_FRAMELESS,
+                        // An undecorated Window.
       TYPE_CONTROL,     // A control, like a button.
       TYPE_POPUP,       // An undecorated Window, with transient properties.
       TYPE_MENU         // An undecorated Window, with transient properties