add HideAndClose in preference to having Close sometimes magically defer

ui/views/widget/desktop_aura/desktop_native_widget_aura.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/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/stacking_client.h"
@@ skipping 424 matching lines @@
   desktop_root_window_host_->AsRootWindowHost()->Show();
   window_->Show();
 }
 
 void DesktopNativeWidgetAura::Hide() {
   desktop_root_window_host_->AsRootWindowHost()->Hide();
   if (window_)
     window_->Hide();
 }
 
+void DesktopNativeWidgetAura::HideAndClose() {
+  if (desktop_root_window_host_->SetCloseOnHideCompletion())
+    Hide();
+  else
+    Close();
+}
+
 void DesktopNativeWidgetAura::ShowMaximizedWithBounds(
       const gfx::Rect& restored_bounds) {
   desktop_root_window_host_->ShowMaximizedWithBounds(restored_bounds);
 }
 
 void DesktopNativeWidgetAura::ShowWithWindowState(ui::WindowShowState state) {
   desktop_root_window_host_->ShowWindowWithState(state);
 }
 
 bool DesktopNativeWidgetAura::IsVisible() const {
@@ skipping 363 matching lines @@
   drop_helper_->OnDragExit();
 }
 
 int DesktopNativeWidgetAura::OnPerformDrop(const ui::DropTargetEvent& event) {
   DCHECK(drop_helper_.get() != NULL);
   return drop_helper_->OnDrop(event.data(), event.location(),
       last_drop_operation_);
 }
 
 }  // namespace views