Move ownership of the AppListViewDelegate into the AppListService

ash/test/test_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 "ash/test/test_shell_delegate.h"
 
 #include <limits>
 
 #include "ash/default_accessibility_delegate.h"
 #include "ash/gpu_support_stub.h"
@@ skipping 125 matching lines @@
 void TestShellDelegate::RemoveVirtualKeyboardStateObserver(
     VirtualKeyboardStateObserver* observer) {
   keyboard_state_observer_list_.RemoveObserver(observer);
 }
 
 content::BrowserContext* TestShellDelegate::GetActiveBrowserContext() {
   active_browser_context_.reset(new content::TestBrowserContext());
   return active_browser_context_.get();
 }
 
-app_list::AppListViewDelegate* TestShellDelegate::CreateAppListViewDelegate() {
-  return new app_list::test::AppListTestViewDelegate;
+app_list::AppListViewDelegate* TestShellDelegate::GetAppListViewDelegate() {
+  if (!app_list_view_delegate_)
+    app_list_view_delegate_.reset(new app_list::test::AppListTestViewDelegate);
+  return app_list_view_delegate_.get();
 }
 
 ShelfDelegate* TestShellDelegate::CreateShelfDelegate(ShelfModel* model) {
   return new TestShelfDelegate(model);
 }
 
 SystemTrayDelegate* TestShellDelegate::CreateSystemTrayDelegate() {
   return new TestSystemTrayDelegate;
 }
 
@@ skipping 39 matching lines @@
 #if defined(OS_CHROMEOS)
   Shell* shell = Shell::GetInstance();
   static_cast<MediaDelegateImpl*>(shell->media_delegate())
       ->set_media_capture_state(state);
   shell->system_tray_notifier()->NotifyMediaCaptureChanged();
 #endif
 }
 
 }  // namespace test
 }  // namespace ash