Add always-on-top property to app windows

ui/views/widget/widget.cc

 // Copyright (c) 2012 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 "ui/views/widget/widget.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 640 matching lines @@
 }
 
 void Widget::DisableInactiveRendering() {
   SetInactiveRenderingDisabled(true);
 }
 
 void Widget::SetAlwaysOnTop(bool on_top) {
   native_widget_->SetAlwaysOnTop(on_top);
 }
 
+bool Widget::IsAlwaysOnTop() const {
+  return native_widget_->IsAlwaysOnTop();
+}
+
 void Widget::Maximize() {
   native_widget_->Maximize();
 }
 
 void Widget::Minimize() {
   native_widget_->Minimize();
 }
 
 void Widget::Restore() {
   native_widget_->Restore();
@@ skipping 756 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views