Add tiles to the experimental app list start page.

ui/app_list/views/contents_view.cc

Index: ui/app_list/views/contents_view.cc
diff --git a/ui/app_list/views/contents_view.cc b/ui/app_list/views/contents_view.cc
index fb5b98a48b6ec93813b6e409e2de4774ecc20c0d..c4a79d194e98e3319c07cc6cf3ff46b3eebfd8ca 100644
--- a/ui/app_list/views/contents_view.cc
+++ b/ui/app_list/views/contents_view.cc
@@ -78,10 +78,7 @@ ContentsView::ContentsView(AppListMainView* app_list_main_view,
   view_model_->Add(search_results_view, kIndexSearchResults);
 
   if (app_list::switches::IsExperimentalAppListEnabled()) {
-    content::WebContents* start_page_contents =
-        view_delegate->GetStartPageContents();
-    start_page_view_ =
-        new StartPageView(app_list_main_view, start_page_contents);
+    start_page_view_ = new StartPageView(app_list_main_view, view_delegate);
     AddChildView(start_page_view_);
     view_model_->Add(start_page_view_, kIndexStartPage);
   }