Request the icon of a Web Notification in the renderer process.

chrome/browser/notifications/notification.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 "chrome/browser/notifications/notification.h"
 
-Notification::Notification(const GURL& origin_url,
-                           const GURL& icon_url,
-                           const base::string16& title,
-                           const base::string16& body,
-                           blink::WebTextDirection dir,
-                           const base::string16& display_source,
-                           const base::string16& replace_id,
-                           NotificationDelegate* delegate)
-    : message_center::Notification(message_center::NOTIFICATION_TYPE_SIMPLE,
-                                   delegate->id(),
-                                   title,
-                                   body,
-                                   gfx::Image(),
-                                   display_source,
-                                   message_center::NotifierId(origin_url),
-                                   message_center::RichNotificationData(),
-                                   delegate),
-      origin_url_(origin_url),
-      icon_url_(icon_url),
-      replace_id_(replace_id),
-      delegate_(delegate) {}
-
 Notification::Notification(
     message_center::NotificationType type,
     const GURL& origin_url,
     const base::string16& title,
     const base::string16& body,
     const gfx::Image& icon,
     blink::WebTextDirection dir,
     const message_center::NotifierId& notifier_id,
     const base::string16& display_source,
     const base::string16& replace_id,
     const message_center::RichNotificationData& rich_notification_data,
     NotificationDelegate* delegate)
     : message_center::Notification(type,
                                    delegate->id(),
                                    title,
                                    body,
                                    icon,
                                    display_source,
                                    notifier_id,
                                    rich_notification_data,
                                    delegate),
       origin_url_(origin_url),
       replace_id_(replace_id),
-      delegate_(delegate) {
-  // It's important to leave |icon_url_| empty with rich notifications enabled,
-  // to prevent "Downloading" the data url and overwriting the existing |icon|.
-}
+      delegate_(delegate) {}
 
 Notification::Notification(const GURL& origin_url,
                            const gfx::Image& icon,
                            const base::string16& title,
                            const base::string16& body,
                            blink::WebTextDirection dir,
                            const base::string16& display_source,
                            const base::string16& replace_id,
                            NotificationDelegate* delegate)
     : message_center::Notification(message_center::NOTIFICATION_TYPE_SIMPLE,
                                    delegate->id(),
                                    title,
                                    body,
                                    icon,
                                    display_source,
                                    message_center::NotifierId(origin_url),
                                    message_center::RichNotificationData(),
                                    delegate),
       origin_url_(origin_url),
       replace_id_(replace_id),
       delegate_(delegate) {}
 
 Notification::Notification(const Notification& notification)
     : message_center::Notification(notification),
       origin_url_(notification.origin_url()),
-      icon_url_(notification.icon_url()),
       button_one_icon_url_(notification.button_one_icon_url()),
       button_two_icon_url_(notification.button_two_icon_url()),
       image_url_(notification.image_url()),
       replace_id_(notification.replace_id()),
       delegate_(notification.delegate()) {}
 
 Notification::~Notification() {}
 
 Notification& Notification::operator=(const Notification& notification) {
   message_center::Notification::operator=(notification);
   origin_url_ = notification.origin_url();
-  icon_url_ = notification.icon_url();
   button_one_icon_url_ = notification.button_one_icon_url();
   button_two_icon_url_ = notification.button_two_icon_url();
   image_url_ = notification.image_url();
   replace_id_ = notification.replace_id();
   delegate_ = notification.delegate();
   return *this;
 }