Add tiles to the experimental app list start page.

ui/app_list/views/start_page_view.h

Index: ui/app_list/views/start_page_view.h
diff --git a/ui/app_list/views/start_page_view.h b/ui/app_list/views/start_page_view.h
index 2239b0ac9303bf740ddc42ab9ed5bb0e896a6dfc..191e572d4a0f6a91d34e203084288d509ba370f7 100644
--- a/ui/app_list/views/start_page_view.h
+++ b/ui/app_list/views/start_page_view.h
@@ -16,12 +16,14 @@ class WebContents;
 namespace app_list {
 
 class AppListMainView;
+class AppListModel;
+class AppListViewDelegate;
 
 // The start page for the experimental app list.
 class StartPageView : public views::View, public views::ButtonListener {
  public:
   StartPageView(AppListMainView* app_list_main_view,
-                content::WebContents* start_page_web_contents);
+                AppListViewDelegate* view_delegate);
   virtual ~StartPageView();
 
   void Reset();
@@ -34,7 +36,10 @@ class StartPageView : public views::View, public views::ButtonListener {
   // The parent view of ContentsView which is the parent of this view.
   AppListMainView* app_list_main_view_;
 
+  AppListModel* model_;  // Owned by AppListSyncableService.
+
   views::View* instant_container_;  // Owned by views hierarchy.
+  views::View* tiles_container_;    // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(StartPageView);
 };