Change ContentsView::SetActivePage to use States rather than indexes.

chrome/browser/ui/ash/app_list/app_list_service_ash.cc

Index: chrome/browser/ui/ash/app_list/app_list_service_ash.cc
diff --git a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
index 38da2f7cd89318317b0086ecb88f148d76291b36..929baf15c8be1bdde08785487dcb1db907acdf5c 100644
--- a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
+++ b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
@@ -49,8 +49,7 @@ void AppListServiceAsh::ShowAndSwitchToState(
 
   app_list::ContentsView* contents_view =
       app_list_view->app_list_main_view()->contents_view();
-  contents_view->SetActivePage(contents_view->GetPageIndexForState(state),
-                               app_list_was_open /* animate */);
+  contents_view->SetActivePage(state, app_list_was_open /* animate */);
 }
 
 void AppListServiceAsh::Init(Profile* initial_profile) {