Save display preference when all display configuration changes has been completed.

chrome/browser/chromeos/display/primary_display_switch_observer.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 "chrome/browser/chromeos/display/primary_display_switch_observer.h"
-
-#include "ash/shell.h"
-#include "chrome/browser/chromeos/display/display_preferences.h"
-#include "ui/aura/root_window.h"
-
-namespace chromeos {
-
-PrimaryDisplaySwitchObserver::PrimaryDisplaySwitchObserver()
-    : primary_root_(ash::Shell::GetInstance()->GetPrimaryRootWindow()) {
-  primary_root_->AddRootWindowObserver(this);
-  primary_root_->AddObserver(this);
-}
-
-PrimaryDisplaySwitchObserver::~PrimaryDisplaySwitchObserver() {
-  primary_root_->RemoveRootWindowObserver(this);
-  primary_root_->RemoveObserver(this);
-}
-
-void PrimaryDisplaySwitchObserver::OnRootWindowMoved(
-    const aura::RootWindow* root_window, const gfx::Point& new_origin) {
-  StoreDisplayPrefs();
-}
-
-void PrimaryDisplaySwitchObserver::OnWindowDestroying(aura::Window* window) {
-  if (primary_root_ == window) {
-    primary_root_->RemoveRootWindowObserver(this);
-    primary_root_->RemoveObserver(this);
-    primary_root_ = ash::Shell::GetInstance()->GetPrimaryRootWindow();
-    primary_root_->AddRootWindowObserver(this);
-    primary_root_->AddObserver(this);
-  }
-}
-
-}  // namespace chromeos