Second try for

chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc

Index: chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc
diff --git a/chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc b/chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc
index 6ffd993558055b3785b0f53e53c081b92ed8ad71..dbd03d2e6a09588dc1a3653f6581801685652bf1 100644
--- a/chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc
+++ b/chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.cc
@@ -207,6 +207,7 @@ ash::LauncherID ChromeLauncherDelegate::CreateAppLauncherItem(
 void ChromeLauncherDelegate::SetItemStatus(ash::LauncherID id,
                                            ash::LauncherItemStatus status) {
   int index = model_->ItemIndexByID(id);
+  DCHECK_GE(index, 0);
   ash::LauncherItem item = model_->items()[index];
   item.status = status;
   model_->Set(index, item);
@@ -244,7 +245,6 @@ void ChromeLauncherDelegate::LauncherItemClosed(ash::LauncherID id) {
   if (id_to_item_map_[id].pinned) {
     // The item is pinned, leave it in the launcher.
     id_to_item_map_[id].updater = NULL;
-    printf("ChromeLauncherDelegate::LauncherItemClosed\n");
     SetItemStatus(id, ash::STATUS_CLOSED);
   } else {
     id_to_item_map_.erase(id);