Fix paint flashing when switching tabs on ChromeOS. It seems like this hidden tab host window isn...

chrome/browser/ui/views/tab_contents/native_tab_contents_view_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/tab_contents/native_tab_contents_view_gtk.h"
 
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 #include "chrome/browser/tab_contents/web_drag_dest_gtk.h"
 #include "chrome/browser/ui/gtk/constrained_window_gtk.h"
 #include "chrome/browser/ui/gtk/tab_contents_drag_source.h"
@@ skipping 39 matching lines @@
     }
     if (event->direction == GDK_SCROLL_UP) {
       delegate->OnNativeTabContentsViewWheelZoom(true);
       return TRUE;
     }
   }
 
   return FALSE;
 }
 
-gfx::NativeView GetHiddenTabHostWindow() {
-  static views::Widget* widget = NULL;
-
-  if (!widget) {
-    widget = new views::Widget;
-    // We don't want this widget to be closed automatically, this causes
-    // problems in tests that close the last non-secondary window.
-    widget->set_is_secondary_widget(false);
-    views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
-    widget->Init(params);
-  }
-
-  return static_cast<views::NativeWidgetGtk*>(widget->native_widget())->
-      window_contents();
-}
-
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTabContentsViewGtk, public:
 
 NativeTabContentsViewGtk::NativeTabContentsViewGtk(
     internal::NativeTabContentsViewDelegate* delegate)
     : views::NativeWidgetGtk(delegate->AsNativeWidgetDelegate()),
       delegate_(delegate),
       ignore_next_char_event_(false),
@@ skipping 37 matching lines @@
   params.native_widget = this;
   params.delete_on_destroy = false;
   GetWidget()->Init(params);
 
   // We need to own the widget in order to attach/detach the native view to a
   // container.
   gtk_object_ref(GTK_OBJECT(GetWidget()->GetNativeView()));
 }
 
 void NativeTabContentsViewGtk::Unparent() {
-  // Note that we do not DCHECK on focus_manager_ as it may be NULL when used
-  // with an external tab container.
-  NativeWidget::ReparentNativeView(GetNativeView(), GetHiddenTabHostWindow());
 }
 
 RenderWidgetHostView* NativeTabContentsViewGtk::CreateRenderWidgetHostView(
     RenderWidgetHost* render_widget_host) {
   RenderWidgetHostViewGtk* view =
       new RenderWidgetHostViewGtk(render_widget_host);
   view->InitAsChild();
   g_signal_connect(view->native_view(), "focus",
                    G_CALLBACK(OnFocus), delegate_->GetTabContents());
   g_signal_connect(view->native_view(), "scroll-event",
@@ skipping 129 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTabContentsView, public:
 
 // static
 NativeTabContentsView* NativeTabContentsView::CreateNativeTabContentsView(
     internal::NativeTabContentsViewDelegate* delegate) {
   return new NativeTabContentsViewGtk(delegate);
 }