[WIP] ash/extensions: Add experimental extension support for window-management in ash.

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 <vector>
 
 #include "ash/shell.h"
 #include "ash/wm/activation_controller.h"
@@ skipping 44 matching lines @@
 
 bool CanActivateWindow(aura::Window* window) {
   DCHECK(window);
   if (!window->GetRootWindow())
     return false;
   aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client && client->CanActivateWindow(window);
 }
 
-bool IsWindowNormal(aura::Window* window) {
+bool IsWindowNormal(const aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
           ui::SHOW_STATE_NORMAL ||
       window->GetProperty(aura::client::kShowStateKey) ==
           ui::SHOW_STATE_DEFAULT;
 }
 
-bool IsWindowMaximized(aura::Window* window) {
+bool IsWindowMaximized(const aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
       ui::SHOW_STATE_MAXIMIZED;
 }
 
-bool IsWindowMinimized(aura::Window* window) {
+bool IsWindowMinimized(const aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
       ui::SHOW_STATE_MINIMIZED;
 }
 
-bool IsWindowFullscreen(aura::Window* window) {
+bool IsWindowFullscreen(const aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
       ui::SHOW_STATE_FULLSCREEN;
 }
 
 void MaximizeWindow(aura::Window* window) {
   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
 }
 
 void MinimizeWindow(aura::Window* window) {
   window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
@@ skipping 34 matching lines @@
        it != children.end();
        ++it) {
     ui::Layer* child = *it;
     DeepDeleteLayers(child);
   }
   delete layer;
 }
 
 }  // namespace wm
 }  // namespace ash