Add support for managing active state of platform apps

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 631 matching lines @@
   window_cycle_controller_.reset();
   aura::client::SetCaptureClient(root_window, NULL);
   capture_controller_.reset();
   aura::client::SetDispatcherClient(root_window, NULL);
   nested_dispatcher_controller_.reset();
   aura::client::SetUserActionClient(root_window, NULL);
   user_action_client_.reset();
   aura::client::SetVisibilityClient(root_window, NULL);
   visibility_controller_.reset();
 
-  // Delete the activation controller after other controllers
-  // because they might have registered ActivationChangeObserver.
-  aura::client::SetActivationClient(root_window, NULL);
-  activation_controller_.reset();
-
   // Launcher widget has a InputMethodBridge that references to
   // input_method_filter_'s input_method_. So explicitly release launcher_
   // before input_method_filter_. And this needs to be after we delete all
   // containers in case there are still live browser windows which access
   // LauncherModel during close.
   launcher_.reset();
 
+  // Delete the activation controller after other controllers and launcher
+  // because they might have registered ActivationChangeObserver.
+  aura::client::SetActivationClient(root_window, NULL);
+  activation_controller_.reset();
+
   DCHECK(instance_ == this);
   instance_ = NULL;
 
 #if defined(OS_CHROMEOS)
   // Remove OutputConfigurator from Dispatcher.
   static_cast<aura::DispatcherLinux*>(
       aura::Env::GetInstance()->GetDispatcher())->RemoveDispatcherForRootWindow(
           output_configurator());
 #endif  // defined(OS_CHROMEOS)
 }
@@ skipping 432 matching lines @@
 void Shell::SetCursor(gfx::NativeCursor cursor) {
   // TODO(oshima): set cursor to all root windows.
   GetPrimaryRootWindow()->SetCursor(cursor);
 }
 
 void Shell::ShowCursor(bool visible) {
   GetPrimaryRootWindow()->ShowCursor(visible);
 }
 
 }  // namespace ash