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

chrome/browser/chromeos/notifications/notification_panel.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.
 
 // Draws the view for the balloons.
 
 #include "chrome/browser/chromeos/notifications/notification_panel.h"
 
 #include <algorithm>
 
@@ skipping 408 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NottificationPanel public.
 
 void NotificationPanel::Show() {
   if (!panel_widget_) {
     panel_widget_ = new views::Widget;
     // TODO(oshima): Using window because Popup widget behaves weird
     // when resizing. This needs to be investigated.
-    Widget::InitParams params(Widget::InitParams::TYPE_POPUP);
+    Widget::InitParams params(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
     // Enable double buffering because the panel has both pure views
     // control and native controls (scroll bar).
     params.double_buffer = true;
 
     gfx::Rect bounds = GetPreferredBounds();
     bounds = bounds.Union(min_bounds_);
     params.bounds = bounds;
     panel_widget_->Init(params);
     // Set minimum bounds so that it can grow freely.
     gtk_widget_set_size_request(GTK_WIDGET(panel_widget_->GetNativeView()),
@@ skipping 416 matching lines @@
                                   &origin);
   return rect.Contains(gfx::Rect(origin, view->size()));
 }
 
 
 bool NotificationPanelTester::IsActive(const BalloonViewImpl* view) const {
   return panel_->active_ == view;
 }
 
 }  // namespace chromeos