WIP: Eliminate event.target() usage from TrayEventFilter

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 <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_delegate.h"
 #include "ash/accelerators/focus_manager_factory.h"
 #include "ash/ash_switches.h"
 #include "ash/autoclick/autoclick_controller.h"
+#include "ash/container_delegate.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/display/cursor_window_controller.h"
 #include "ash/display/display_configuration_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/event_transformation_handler.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/display/screen_position_controller.h"
 #include "ash/display/window_tree_host_manager.h"
@@ skipping 817 matching lines @@
   wm_globals_.reset();
 
   // Depends on |focus_client_|, so must be destroyed before.
   window_tree_host_manager_->Shutdown();
   window_tree_host_manager_.reset();
   focus_client_.reset();
   screen_position_controller_.reset();
   accessibility_delegate_.reset();
   new_window_delegate_.reset();
   media_delegate_.reset();
+  container_delegate_.reset();
   pointer_watcher_delegate_.reset();
 
   keyboard::KeyboardController::ResetInstance(nullptr);
 
 #if defined(OS_CHROMEOS)
   display_color_manager_.reset();
   if (display_change_observer_)
     display_configurator_->RemoveObserver(display_change_observer_.get());
   if (display_error_observer_)
     display_configurator_->RemoveObserver(display_error_observer_.get());
@@ skipping 219 matching lines @@
 
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(
       new DesktopBackgroundController(blocking_pool_));
   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 
   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
   media_delegate_.reset(delegate_->CreateMediaDelegate());
+  container_delegate_ = delegate_->CreateContainerDelegate();
   pointer_watcher_delegate_ = delegate_->CreatePointerWatcherDelegate();
 
   resize_shadow_controller_.reset(new ResizeShadowController());
   shadow_controller_.reset(
       new ::wm::ShadowController(activation_client_));
 
   // Create system_tray_notifier_ before the delegate.
   system_tray_notifier_.reset(new SystemTrayNotifier());
 
   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
@@ skipping 159 matching lines @@
 
 void Shell::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash