arc: Hide app list view on ARC app launch.

chrome/browser/ui/app_list/chrome_app_list_item.h

Index: chrome/browser/ui/app_list/chrome_app_list_item.h
diff --git a/chrome/browser/ui/app_list/chrome_app_list_item.h b/chrome/browser/ui/app_list/chrome_app_list_item.h
index 0812175779c0a45e6c0880b5e2a4796563d79546..37eb7a81b9939b949185d86fbc4745590c6560f0 100644
--- a/chrome/browser/ui/app_list/chrome_app_list_item.h
+++ b/chrome/browser/ui/app_list/chrome_app_list_item.h
@@ -23,6 +23,12 @@ class ImageSkia;
 
 // Base class of all chrome app list items.
 class ChromeAppListItem : public app_list::AppListItem {
+ public:
+  // AppListControllerDelegate is not properly implemented in tests. Use mock
+  // |controller| for unit_tests.
+  static void OverrideAppListControllerDelegateForTesting(
+      AppListControllerDelegate* controller);
+
  protected:
   ChromeAppListItem(Profile* profile, const std::string& app_id);
   ~ChromeAppListItem() override;