Add Hide and Show to the app list SearchBoxView.

ui/app_list/views/app_list_main_view_unittest.cc

Index: ui/app_list/views/app_list_main_view_unittest.cc
diff --git a/ui/app_list/views/app_list_main_view_unittest.cc b/ui/app_list/views/app_list_main_view_unittest.cc
index 6ca1820ef44d28d713fedf94f6b32a0fb940defb..985fd831e02b7478e460e216eff5b00c880c6648 100644
--- a/ui/app_list/views/app_list_main_view_unittest.cc
+++ b/ui/app_list/views/app_list_main_view_unittest.cc
@@ -36,8 +36,10 @@ class AppListMainViewTest : public views::ViewsTestBase {
     delegate_.reset(new AppListTestViewDelegate);
     delegate_->GetTestModel()->PopulateApps(kInitialItems);
 
-    main_view_ =
-        new AppListMainView(delegate_.get(), &pagination_model_, GetContext());
+    main_view_ = new AppListMainView(NULL,
+                                     delegate_.get(),
+                                     &pagination_model_,
+                                     GetContext());
     main_view_->SetPaintToLayer(true);
 
     widget_ = new views::Widget;