Add badge to web notifications.

chrome/browser/notifications/platform_notification_service_impl.cc

 // 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.
 
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 468 matching lines @@
       origin, notification_data.tag, message_center::RichNotificationData(),
       delegate);
 
   notification.set_context_message(
       DisplayNameForContextMessage(profile, origin));
   notification.set_vibration_pattern(notification_data.vibration_pattern);
   notification.set_timestamp(notification_data.timestamp);
   notification.set_renotify(notification_data.renotify);
   notification.set_silent(notification_data.silent);
 
+  // TODO(peter): Handle different screen densities instead of always using the
+  // 1x bitmap - crbug.com/585815.
+  notification.set_small_image(
+      gfx::Image::CreateFrom1xBitmap(notification_resources.small_icon));

[Peter Beverloo, 2016/03/03 17:55:38]

What does this actually do on desktop? Do we try to render it, or give the cog
precedence?

[Michael van Ouwerkerk, 2016/03/09 18:28:25]

If there are no buttons, they render on top of each other. Otherwise, the small
icon goes in the bottom right corner which is part of a button. We should
probably badge the main notification icon instead.

+
   // Developer supplied action buttons.
   std::vector<message_center::ButtonInfo> buttons;
   for (size_t i = 0; i < notification_data.actions.size(); i++) {
     message_center::ButtonInfo button(notification_data.actions[i].title);
     // TODO(peter): Handle different screen densities instead of always using
     // the 1x bitmap - crbug.com/585815.
     button.icon =
         gfx::Image::CreateFrom1xBitmap(notification_resources.action_icons[i]);
     buttons.push_back(button);
   }
@@ skipping 56 matching lines @@
         extensions::ExtensionRegistry::Get(profile)->GetExtensionById(
             origin.host(), extensions::ExtensionRegistry::EVERYTHING);
     DCHECK(extension);
 
     return base::UTF8ToUTF16(extension->name());
   }
 #endif
 
   return base::string16();
 }