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

chrome/browser/ui/views/browser_bubble_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/ui/views/browser_bubble.h"
 
 #include <vector>
 
 #include "chrome/browser/ui/views/bubble/border_contents.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
@@ skipping 77 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BubbleWidget);
 };
 
 }  // namespace
 
 void BrowserBubble::InitPopup(const gfx::Insets& content_margins) {
   // TODO(port)
   BubbleWidget* bubble_widget = new BubbleWidget(this, content_margins);
   popup_ = bubble_widget->GetWidget();
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.transparent = true;
   params.parent = frame_->GetNativeView();
   params.native_widget = bubble_widget;
   popup_->Init(params);
 #if defined(OS_CHROMEOS)
   {
     vector<int> params;
     params.push_back(0);  // don't show while screen is locked
     chromeos::WmIpc::instance()->SetWindowType(
         popup_->GetNativeView(),
@@ skipping 40 matching lines @@
   gfx::Rect contents_bounds;
   border_contents->SizeAndGetBounds(GetAbsoluteRelativeTo(),
       arrow_location_, false, view_->size(),
       &contents_bounds, &window_bounds);
 
   border_contents->SetBoundsRect(gfx::Rect(gfx::Point(), window_bounds.size()));
   view_->SetBoundsRect(contents_bounds);
 
   SetAbsoluteBounds(window_bounds);
 }