Created initial multi-item notification view

ui/notifications/notification_types.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 "ui/notifications/notification_types.h"
 
 namespace ui {
 
 namespace notifications {
 
 const char kMessageIntentKey[] = "message_intent";
 const char kPriorityKey[] = "priority";
 const char kTimestampKey[] = "timestamp";
 const char kSecondIconUrlKey[] = "second_icon_url";
 const char kUnreadCountKey[] = "unread_count";
 const char kButtonOneTitleKey[] = "button_one_title";
 const char kButtonOneIntentKey[] = "button_one_intent";
 const char kButtonTwoTitleKey[] = "button_two_title";
 const char kButtonTwoIntentKey[] = "button_two_intent";
 const char kExpandedMessageKey[] = "expanded_message";
 const char kImageUrlKey[] = "image_url";
 
 const char kSimpleType[] = "simple";
 const char kBaseFormatType[] = "base";
+const char kMultipleType[] = "multiple";
 
 NotificationType StringToNotificationType(std::string& string_type) {
   if (string_type == kSimpleType)
     return NOTIFICATION_TYPE_SIMPLE;
   if (string_type == kBaseFormatType)
     return NOTIFICATION_TYPE_BASE_FORMAT;
+  if (string_type == kMultipleType)
+    return NOTIFICATION_TYPE_MULTIPLE;
 
   // In case of unrecognized string, fall back to most common type.
   return NOTIFICATION_TYPE_SIMPLE;
 }
 
 }  // namespace notifications
 
 }  // namespace ui