chromeos: Fix pixelated icons in app list and launcher (part 3)

ui/app_list/app_list_item_view.cc

Index: ui/app_list/app_list_item_view.cc
diff --git a/ui/app_list/app_list_item_view.cc b/ui/app_list/app_list_item_view.cc
index 8c405fbe26fcb1f3a55ea54bc63ef1e22c5260bb..246d3ad6c574f953b48cd46c59ea93fbf8b6f756 100644
--- a/ui/app_list/app_list_item_view.cc
+++ b/ui/app_list/app_list_item_view.cc
@@ -184,10 +184,12 @@ void AppListItemView::UpdateIcon() {
   if (icon_size_.IsEmpty())
     return;
 
-  gfx::ImageSkia icon = model_->icon();
-  // Clear icon and bail out if model icon is empty.
-  if (icon.isNull()) {
-    icon_->SetImage(NULL);
+  const gfx::ImageSkia& icon = model_->icon();
+  // Use empty model icon and bail out. OnPaint should trigger image
+  // representation fetching and if there is an icon, UpdateIcon should be
+  // called again with the updated image.
+  if (icon.isNull() || icon.image_reps().size() == 0) {
+    icon_->SetImage(icon);
     return;
   }