Move ownership of the AppListViewDelegate into the AppListService

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index 982cae47873e1705228507fb9d9d9dc3982e186b..1d951888adc3958d3dccf947a01b1b71dc38a044 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -143,8 +143,10 @@ content::BrowserContext* TestShellDelegate::GetActiveBrowserContext() {
   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) {