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

chrome/browser/chromeos/frame/panel_controller.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/frame/panel_controller.h"
 
 #if defined(TOUCH_UI)
 #include <X11/Xlib.h>
 #if defined(HAVE_XINPUT2)
 #include <X11/extensions/XInput2.h>
@@ skipping 166 matching lines @@
        urgent_(false) {
 }
 
 void PanelController::Init(bool initial_focus,
                            const gfx::Rect& window_bounds,
                            XID creator_xid,
                            WmIpcPanelUserResizeType resize_type) {
   gfx::Rect title_bounds(0, 0, window_bounds.width(), kTitleHeight);
 
   title_window_ = new views::Widget;
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.transparent = true;
   params.bounds = title_bounds;
   title_window_->Init(params);
   gtk_widget_set_size_request(title_window_->GetNativeView(),
                               title_bounds.width(), title_bounds.height());
   title_ = title_window_->GetNativeView();
   title_xid_ = ui::GetX11WindowFromGtkWidget(title_);
 
   WmIpc::instance()->SetWindowType(
       title_,
@@ skipping 308 matching lines @@
     views::Button* sender, const views::Event& event) {
   if (panel_controller_ && sender == close_button_)
     panel_controller_->OnCloseButtonPressed();
 }
 
 PanelController::TitleContentView::~TitleContentView() {
   VLOG(1) << "panel: delete " << this;
 }
 
 }  // namespace chromeos