Aura: Add non-browser windows into the list of "Alt + Tab" cycle list.

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"
@@ skipping 35 matching lines @@
 
 aura::Window* GetActiveWindow() {
   return aura::client::GetActivationClient(Shell::GetRootWindow())->
       GetActiveWindow();
 }
 
 aura::Window* GetActivatableWindow(aura::Window* window) {
   return internal::ActivationController::GetActivatableWindow(window, NULL);
 }
 
+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) {
   return window->GetProperty(aura::client::kShowStateKey) ==
           ui::SHOW_STATE_NORMAL ||
       window->GetProperty(aura::client::kShowStateKey) ==
           ui::SHOW_STATE_DEFAULT;
 }
 
 bool IsWindowMaximized(aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
       ui::SHOW_STATE_MAXIMIZED;
@@ skipping 20 matching lines @@
 void SetOpenWindowSplit(aura::Window* window, bool value) {
   window->SetProperty(kOpenWindowSplitKey, value);
 }
 
 bool GetOpenWindowSplit(aura::Window* window) {
   return window->GetProperty(kOpenWindowSplitKey);
 }
 
 }  // namespace wm
 }  // namespace ash