Reduce creation of ViewsDelegate

ash/test/ash_test_views_delegate.cc

+// Copyright 2014 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/ash_test_views_delegate.h"
+
+#include "ash/shell.h"
+#include "content/public/test/web_contents_tester.h"
+
+namespace ash {
+namespace test {
+
+AshTestViewsDelegate::AshTestViewsDelegate() {
+}
+
+AshTestViewsDelegate::~AshTestViewsDelegate() {
+}
+
+content::WebContents* AshTestViewsDelegate::CreateWebContents(
+    content::BrowserContext* browser_context,
+    content::SiteInstance* site_instance) {
+  return content::WebContentsTester::CreateTestWebContents(browser_context,
+                                                           site_instance);
+}
+
+void AshTestViewsDelegate::OnBeforeWidgetInit(
+    views::Widget::InitParams* params,
+    views::internal::NativeWidgetDelegate* delegate) {
+  TestViewsDelegate::OnBeforeWidgetInit(params, delegate);
+
+  if (!params->parent && !params->context && ash::Shell::HasInstance()) {
+    // If the window has neither a parent nor a context add to the root.
+    params->parent = ash::Shell::GetInstance()->GetPrimaryRootWindow();
+  }
+}
+
+}  // namespace test
+}  // namespace ash