Add search results to experimental app list start page.

ui/app_list/views/app_list_main_view.cc

Index: ui/app_list/views/app_list_main_view.cc
diff --git a/ui/app_list/views/app_list_main_view.cc b/ui/app_list/views/app_list_main_view.cc
index dcb57803c4acf6d55539b8c7838c12b0baa27f7b..94b951277077a8be9bb8b9767a28677e9ac942ce 100644
--- a/ui/app_list/views/app_list_main_view.cc
+++ b/ui/app_list/views/app_list_main_view.cc
@@ -253,7 +253,14 @@ void AppListMainView::QueryChanged(SearchBoxView* sender) {
   base::string16 query;
   base::TrimWhitespace(model_->search_box()->text(), base::TRIM_ALL, &query);
   bool should_show_search = !query.empty();
-  contents_view_->ShowSearchResults(should_show_search);
+
+  ContentsView::ShowState show_state = ContentsView::SHOW_SEARCH_RESULTS;
+  if (!should_show_search) {
+    show_state = app_list::switches::IsExperimentalAppListEnabled()
+                     ? ContentsView::SHOW_START_PAGE
+                     : ContentsView::SHOW_APPS;
+  }
+  contents_view_->SetShowState(show_state);
 
   if (should_show_search)
     delegate_->StartSearch();