Add always on top windows to the alt+tab list

ash/shell.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/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 679 matching lines @@
   }
 }
 
 void Shell::InitRootWindowController(
     internal::RootWindowController* controller) {
   aura::RootWindow* root_window = controller->root_window();
   DCHECK(activation_controller_.get());
   DCHECK(visibility_controller_.get());
   DCHECK(drag_drop_controller_.get());
   DCHECK(capture_controller_.get());
+  DCHECK(window_cycle_controller_.get());
 
   root_window->set_focus_manager(focus_manager_.get());
   input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
   aura::client::SetActivationClient(root_window, activation_controller_.get());
   aura::client::SetVisibilityClient(root_window, visibility_controller_.get());
   aura::client::SetDragDropClient(root_window, drag_drop_controller_.get());
   aura::client::SetCaptureClient(root_window, capture_controller_.get());
   aura::client::SetScreenPositionClient(root_window,
                                         screen_position_controller_.get());
   aura::client::SetCursorClient(root_window, &cursor_manager_);
@@ skipping 11 matching lines @@
 
   // TODO(oshima): Move the instance to RootWindowController when
   // the extended desktop is enabled by default.
   internal::AlwaysOnTopController* always_on_top_controller =
       new internal::AlwaysOnTopController;
   always_on_top_controller->SetContainers(
       root_window->GetChildById(internal::kShellWindowId_DefaultContainer),
       root_window->GetChildById(internal::kShellWindowId_AlwaysOnTopContainer));
   root_window->SetProperty(internal::kAlwaysOnTopControllerKey,
                            always_on_top_controller);
+
+  window_cycle_controller_->OnRootWindowAdded(root_window);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, private:
 
 void Shell::InitLayoutManagersForPrimaryDisplay(
     internal::RootWindowController* controller) {
   DCHECK(status_area_widget_);
 
   internal::ShelfLayoutManager* shelf_layout_manager =
@@ skipping 41 matching lines @@
 }
 
 void Shell::ShowCursor(bool visible) {
   RootWindowList root_windows = GetAllRootWindows();
   for (RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter)
     (*iter)->ShowCursor(visible);
 }
 
 }  // namespace ash