WIP: Eliminate event.target() usage from TrayEventFilter

chrome/browser/ui/ash/chrome_shell_delegate.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 "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include <stddef.h>
 
+#include "ash/container_delegate_aura.h"
 #include "ash/content/gpu_support_impl.h"
 #include "ash/pointer_watcher_delegate_aura.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/wm/common/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 130 matching lines @@
 
 ash::ShelfDelegate* ChromeShellDelegate::CreateShelfDelegate(
     ash::ShelfModel* model) {
   if (!shelf_delegate_) {
     shelf_delegate_ = ChromeLauncherController::CreateInstance(NULL, model);
     shelf_delegate_->Init();
   }
   return shelf_delegate_;
 }
 
+std::unique_ptr<ash::ContainerDelegate>
+ChromeShellDelegate::CreateContainerDelegate() {
+  return base::WrapUnique(new ash::ContainerDelegateAura);
+}
+
 std::unique_ptr<ash::PointerWatcherDelegate>
 ChromeShellDelegate::CreatePointerWatcherDelegate() {
   return base::WrapUnique(new ash::PointerWatcherDelegateAura);
 }
 
 ui::MenuModel* ChromeShellDelegate::CreateContextMenu(
     ash::Shelf* shelf,
     const ash::ShelfItem* item) {
   DCHECK(shelf_delegate_);
   // Don't show context menu for exclusive app runtime mode.
@@ skipping 58 matching lines @@
 
 void ChromeShellDelegate::AddVirtualKeyboardStateObserver(
     ash::VirtualKeyboardStateObserver* observer) {
   keyboard_state_observer_list_.AddObserver(observer);
 }
 
 void ChromeShellDelegate::RemoveVirtualKeyboardStateObserver(
     ash::VirtualKeyboardStateObserver* observer) {
   keyboard_state_observer_list_.RemoveObserver(observer);
 }