Add unittests of ArcCustomNotificationView

ui/arc/notification/arc_notification_delegate.cc

+// Copyright 2016 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 "ui/arc/notification/arc_notification_delegate.h"
+
+#include "ui/arc/notification/arc_custom_notification_view.h"
+
+namespace arc {
+
+ArcNotificationDelegate::ArcNotificationDelegate(
+    base::WeakPtr<ArcNotificationItem> item)
+    : item_(item) {
+  DCHECK(item_);
+}
+
+ArcNotificationDelegate::~ArcNotificationDelegate() {}
+
+std::unique_ptr<message_center::CustomContent>
+ArcNotificationDelegate::CreateCustomContent() {
+  DCHECK(item_);
+  auto view = base::MakeUnique<ArcCustomNotificationView>(item_.get());
+  auto content_view_delegate = view->CreateContentViewDelegate();
+  return base::MakeUnique<message_center::CustomContent>(
+      std::move(view), std::move(content_view_delegate));
+}
+
+void ArcNotificationDelegate::Close(bool by_user) {
+  DCHECK(item_);
+  item_->Close(by_user);
+}
+
+}  // namespace arC