Add badge to web notifications.

content/child/notifications/pending_notification.cc

Index: content/child/notifications/pending_notification.cc
diff --git a/content/child/notifications/pending_notification.cc b/content/child/notifications/pending_notification.cc
index cc6542e6eeb1f8666bcd03b8e10d862e074400e8..ea8801b9eb6e9148691800fcbfbef9766ab3562a 100644
--- a/content/child/notifications/pending_notification.cc
+++ b/content/child/notifications/pending_notification.cc
@@ -51,13 +51,16 @@ void PendingNotification::FetchResources(
   size_t num_actions = notification_data.actions.size();
   action_icons_.resize(num_actions);
 
-  size_t num_closures = 1 /* notification icon */ + num_actions;
+  size_t num_closures = 2 /* notification icon and small icon */ + num_actions;
   fetches_finished_barrier_closure_ =
       base::BarrierClosure(num_closures, fetches_finished_callback);
 
   FetchImageResource(notification_data.icon,
                      base::Bind(&PendingNotification::DidFetchNotificationIcon,
                                 weak_factory_.GetWeakPtr()));
+  FetchImageResource(notification_data.smallIcon,
+                     base::Bind(&PendingNotification::DidFetchSmallIcon,
+                                weak_factory_.GetWeakPtr()));
   for (size_t i = 0; i < num_actions; i++) {
     FetchImageResource(notification_data.actions[i].icon,
                        base::Bind(&PendingNotification::DidFetchActionIcon,
@@ -68,6 +71,7 @@ void PendingNotification::FetchResources(
 NotificationResources PendingNotification::GetResources() const {
   NotificationResources resources;
   resources.notification_icon = notification_icon_;
+  resources.small_icon = small_icon_;
   resources.action_icons = action_icons_;
   return resources;
 }
@@ -102,6 +106,12 @@ void PendingNotification::DidFetchNotificationIcon(const SkBitmap& icon) {
   fetches_finished_barrier_closure_.Run();
 }
 
+void PendingNotification::DidFetchSmallIcon(const SkBitmap& icon) {
+  small_icon_ =
+      ScaleDownIfNeeded(icon, kPlatformNotificationMaxSmallIconSizePx);
+  fetches_finished_barrier_closure_.Run();
+}
+
 void PendingNotification::DidFetchActionIcon(size_t action_index,
                                              const SkBitmap& icon) {
   DCHECK_LT(action_index, action_icons_.size());