Add badge to web notifications.

chrome/browser/notifications/platform_notification_service_impl.cc

Index: chrome/browser/notifications/platform_notification_service_impl.cc
diff --git a/chrome/browser/notifications/platform_notification_service_impl.cc b/chrome/browser/notifications/platform_notification_service_impl.cc
index 3c125e4f60aa17f64a7ecd68622ea802852966f5..56adbc1d65adae809840f9dade778ccc3465bfff 100644
--- a/chrome/browser/notifications/platform_notification_service_impl.cc
+++ b/chrome/browser/notifications/platform_notification_service_impl.cc
@@ -486,6 +486,11 @@ Notification PlatformNotificationServiceImpl::CreateNotificationFromData(
   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++) {