Initial implementation of new-style notification

ui/arc/notification/arc_notification_item_impl.cc

 // Copyright 2017 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_item_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
@@ skipping 59 matching lines @@
 void ArcNotificationItemImpl::OnUpdatedFromAndroid(
     mojom::ArcNotificationDataPtr data) {
   DCHECK(CalledOnValidThread());
   DCHECK_EQ(notification_key_, data->key);
 
   message_center::RichNotificationData rich_data;
   rich_data.pinned = (data->no_clear || data->ongoing_event);
   rich_data.priority = ConvertAndroidPriority(data->priority);
   if (data->small_icon)
     rich_data.small_image = gfx::Image::CreateFrom1xBitmap(*data->small_icon);
-  if (data->accessible_name.has_value())
-    rich_data.accessible_name = base::UTF8ToUTF16(*data->accessible_name);
+  if (data->accessible_name.has_value()) {
+    accessible_name_ = base::UTF8ToUTF16(*data->accessible_name);
+  } else {
+    accessible_name_ = base::JoinString(
+        {base::UTF8ToUTF16(data->title), base::UTF8ToUTF16(data->message)},
+        base::ASCIIToUTF16("\n"));
+  }
+  rich_data.accessible_name = accessible_name_;
 
   message_center::NotifierId notifier_id(
       message_center::NotifierId::SYSTEM_COMPONENT, kNotifierId);
   notifier_id.profile_id = profile_id_.GetUserEmail();
 
   auto notification = base::MakeUnique<message_center::Notification>(
       message_center::NOTIFICATION_TYPE_CUSTOM, notification_id_,
       base::UTF8ToUTF16(data->title), base::UTF8ToUTF16(data->message),
       gfx::Image(),
       base::UTF8ToUTF16("arc"),  // display source
@@ skipping 96 matching lines @@
 }
 
 const std::string& ArcNotificationItemImpl::GetNotificationKey() const {
   return notification_key_;
 }
 
 const std::string& ArcNotificationItemImpl::GetNotificationId() const {
   return notification_id_;
 }
 
+const base::string16& ArcNotificationItemImpl::GetAccessibleName() const {
+  return accessible_name_;
+}
+
 }  // namespace arc