Adding a new window type for frameless non-transient top level windows, used by ChromeOS' window ...

chrome/browser/chromeos/login/user_controller_gtk.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/user_controller.h"
 
 #include "views/widget/native_widget_gtk.h"
 
 using views::NativeWidgetGtk;
 
@@ skipping 40 matching lines @@
   }
 
   UserController* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ClickNotifyingWidget);
 };
 
 views::Widget* InitWidget(views::WidgetDelegate* delegate,
                           views::NativeWidget* native_widget,
                           const gfx::Rect& bounds) {
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.delegate = delegate;
   params.transparent = true;
   params.bounds = bounds;
   params.native_widget = native_widget;
   native_widget->GetWidget()->Init(params);
   GdkWindow* gdk_window = native_widget->GetWidget()->GetNativeView()->window;
   gdk_window_set_back_pixmap(gdk_window, NULL, false);
   return native_widget->GetWidget();
 }
 
 }  // namespace
 
 // static
 views::Widget* UserController::CreateControlsWidget(
     views::WidgetDelegate* delegate,
     const gfx::Rect& bounds) {
   return InitWidget(delegate, new ControlsWidget(), bounds);
 }
 
 // static
 views::Widget* UserController::CreateClickNotifyingWidget(
     UserController* controller,
     const gfx::Rect& bounds) {
   return InitWidget(controller, new ClickNotifyingWidget(controller), bounds);
 }
 
 }  // namespace