Handle app custom icon via aura::Window property.

chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc

Index: chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc
index 97c20fcf43d4871992e7e8fdde5639e138b011ed..79f0f7d6094f2aadd80368a854666cf28b07c96b 100644
--- a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc
@@ -116,7 +116,7 @@ void ArcAppDeferredLauncherController::Close(const std::string& app_id) {
   app_controller_map_.erase(it);
   if (need_close_item)
     owner_->CloseLauncherItem(shelf_id);
-  UpdateApp(safe_app_id);
+  UpdateShelfItemIcon(safe_app_id);
 }
 
 void ArcAppDeferredLauncherController::OnAppReadyChanged(
@@ -163,10 +163,9 @@ base::TimeDelta ArcAppDeferredLauncherController::GetActiveTime(
   return it->second->GetActiveTime();
 }
 
-void ArcAppDeferredLauncherController::UpdateApp(const std::string& app_id) {
-  AppIconLoader* icon_loader = owner_->GetAppIconLoaderForApp(app_id);
-  if (icon_loader)
-    icon_loader->UpdateImage(app_id);
+void ArcAppDeferredLauncherController::UpdateShelfItemIcon(
+    const std::string& app_id) {
+  owner_->UpdateLauncherItemImage(app_id);
 }
 
 void ArcAppDeferredLauncherController::UpdateApps() {
@@ -175,7 +174,7 @@ void ArcAppDeferredLauncherController::UpdateApps() {
 
   RegisterNextUpdate();
   for (const auto pair : app_controller_map_)
-    UpdateApp(pair.first);
+    UpdateShelfItemIcon(pair.first);
 }
 
 void ArcAppDeferredLauncherController::RegisterNextUpdate() {