ash: Add accelerator for snapping windows left/right.

ash/wm/window_util.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 "ash/wm/window_util.h"
 
 #include "ash/shell.h"
 #include "ash/wm/activation_controller.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
+#include "ui/aura/env.h"
+#include "ui/aura/monitor.h"
+#include "ui/aura/monitor_manager.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/screen.h"
 
 DECLARE_WINDOW_PROPERTY_TYPE(bool);
 
 namespace ash {
 DEFINE_WINDOW_PROPERTY_KEY(bool, kOpenWindowSplitKey, false);
@@ skipping 68 matching lines @@
 }
 
 void MinimizeWindow(aura::Window* window) {
   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
 }
 
 void RestoreWindow(aura::Window* window) {
   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
 }
 
+void CenterWindow(aura::Window* window) {
+  const aura::Monitor* monitor = aura::Env::GetInstance()->monitor_manager()->
+      GetMonitorNearestWindow(window);
+  gfx::Rect center = monitor->GetWorkAreaBounds().Center(
+      window->bounds().size());
+  window->SetBounds(center);

[Daniel Erat, 2012/04/25 16:11:42]

should this be taking the grid into account?

[sadrul, 2012/04/25 16:15:38]

[don't have an opinion]

+}
+
 }  // namespace wm
 }  // namespace ash