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

chrome/browser/chromeos/panels/panel_scroller.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/panels/panel_scroller.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
@@ skipping 63 matching lines @@
   AddChildView(panels_[4]->header);
 }
 
 PanelScroller::~PanelScroller() {
   STLDeleteContainerPointers(panels_.begin(), panels_.end());
 }
 
 // static
 PanelScroller* PanelScroller::CreateWindow() {
   views::Widget* widget = new views::Widget;
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.bounds = gfx::Rect(0, 0, 100, 800);
   widget->Init(params);
 
   PanelScroller* scroller = new PanelScroller();
   widget->SetContentsView(scroller);
 
   widget->Show();
 
   return scroller;
 }
@@ skipping 141 matching lines @@
 }
 
 void PanelScroller::AnimationProgressed(const ui::Animation* animation) {
   scroll_pos_ = static_cast<int>(
       static_cast<double>(animated_scroll_end_ - animated_scroll_begin_) *
       animation_.GetCurrentValue()) + animated_scroll_begin_;
 
   Layout();
   SchedulePaint();
 }