Shows the label "Unnamed Folder" in the app list when a group is created...

Shows the label "Unnamed Folder" in the app list when a group is created without creating a custom name.

Bug: 755547
Change-Id: I31f24f546fa508737920e5d8a590028fd80a0480
Reviewed-on: https://chromium-review.googlesource.com/c/1343000Reviewed-by: Weidong Guo <weidongg@chromium.org>
Commit-Queue: Matthew Mourgos <mmourgos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609565}

ash/app_list/views/app_list_item_view.cc

@@ -407,7 +407,12 @@ void AppListItemView::SetAsAttemptedFolderTarget(bool is_target_folder) {
 
 void AppListItemView::SetItemName(const base::string16& display_name,
                                   const base::string16& full_name) {
-  title_->SetText(display_name);
+  if (is_folder_ && display_name.empty()) {
+    title_->SetText(ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
+        IDS_APP_LIST_FOLDER_NAME_PLACEHOLDER));
+  } else {
+    title_->SetText(display_name);
+  }
 
   tooltip_text_ = display_name == full_name ? base::string16() : full_name;