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

chrome/browser/chromeos/login/screen_locker.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/screen_locker.h"
 
 #include <X11/extensions/XTest.h>
 #include <X11/keysym.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
@@ skipping 716 matching lines @@
 void ScreenLocker::Init() {
   static const GdkColor kGdkBlack = {0, 0, 0, 0};
 
   authenticator_ = LoginUtils::Get()->CreateAuthenticator(this);
 
   gfx::Point left_top(1, 1);
   gfx::Rect init_bounds(views::Screen::GetMonitorAreaNearestPoint(left_top));
 
   LockWindow* lock_window = new LockWindow();
   lock_window_ = lock_window->GetWidget();
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.bounds = init_bounds;
   params.native_widget = lock_window;
   lock_window_->Init(params);
   gtk_widget_modify_bg(
       lock_window_->GetNativeView(), GTK_STATE_NORMAL, &kGdkBlack);
 
   g_signal_connect(lock_window_->GetNativeView(), "client-event",
                    G_CALLBACK(OnClientEventThunk), this);
 
   // GTK does not like zero width/height.
@@ skipping 468 matching lines @@
 
 bool ScreenLocker::AcceleratorPressed(const views::Accelerator& accelerator) {
   if (!background_view_->IsScreenSaverVisible()) {
     StartScreenSaver();
     return true;
   }
   return false;
 }
 
 }  // namespace chromeos