Add Notification images (Blink + desktop implementation)

content/public/common/platform_notification_data.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_
 #define CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 65 matching lines @@
   // BCP 47 language tag describing the notification's contents. Optional.
   std::string lang;
 
   // Contents of the notification.
   base::string16 body;
 
   // Tag of the notification. Notifications sharing both their origin and their
   // tag will replace the first displayed notification.
   std::string tag;
 
+  // URL of the image contents of the notification. May be empty if no url was
+  // specified.
+  GURL image;
+
   // URL of the icon which is to be displayed with the notification.
   GURL icon;
 
   // URL of the badge for representing the notification. May be empty if no url
   // was specified.
   GURL badge;
 
   // Vibration pattern for the notification, following the syntax of the
   // Vibration API. https://www.w3.org/TR/vibration/
   std::vector<int> vibration_pattern;
@@ skipping 17 matching lines @@
   // a serialized string. Must not exceed |kMaximumDeveloperDataSize| bytes.
   std::vector<char> data;
 
   // Actions that should be shown as buttons on the notification.
   std::vector<PlatformNotificationAction> actions;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_