Experimental app list banner now appears on top of launcher pages.

ui/app_list/views/app_list_view.h

Index: ui/app_list/views/app_list_view.h
diff --git a/ui/app_list/views/app_list_view.h b/ui/app_list/views/app_list_view.h
index f99bdf402339233a054633bdb6bcd100037b0683..bf83fc18fed3ef79c3ff53c090d5117c96df0278 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -22,6 +22,10 @@ namespace test {
 class AppListViewTestApi;
 }
 
+namespace views {
+class ImageView;
+}
+
 namespace app_list {
 class ApplicationDragAndDropHost;
 class AppListMainView;
@@ -157,6 +161,9 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
   AppListMainView* app_list_main_view_;
   SpeechView* speech_view_;
 
+  // The red "experimental" banner for the experimental app list.
+  views::ImageView* experimental_banner_view_;
+
   // A semi-transparent white overlay that covers the app list while dialogs are
   // open.
   views::View* overlay_view_;