Added HALF, FULLSCREEN_ALL_APPS, and FULLSCREEN_SEARCH.

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

Index: chrome/browser/ui/ash/app_list/app_list_presenter_delegate_mus.cc
diff --git a/chrome/browser/ui/ash/app_list/app_list_presenter_delegate_mus.cc b/chrome/browser/ui/ash/app_list/app_list_presenter_delegate_mus.cc
index d82621be9f3a6d740d53277ee13bfedce35e77fb..5edc28ce48d3c93e5346ffeedde42294cb14f9cd 100644
--- a/chrome/browser/ui/ash/app_list/app_list_presenter_delegate_mus.cc
+++ b/chrome/browser/ui/ash/app_list/app_list_presenter_delegate_mus.cc
@@ -57,14 +57,15 @@ void AppListPresenterDelegateMus::Init(app_list::AppListView* view,
                                        int64_t display_id,
                                        int current_apps_page) {
   view_ = view;
-
+  // TODO(newcomer): replace Initialize parameters with proper mus
+  // implementation as per crbug.com/726838
   // Note: This would place the app list into the USER_WINDOWS container, unlike
   // in classic ash, where it has it's own container.
   // TODO(mfomitchev): We are currently passing NULL for |parent|. It seems like
   // the only thing this is used for is choosing the right scale factor in
   // AppListMainView::PreloadIcons(), so we take care of that - perhaps by
   // passing the display_id or the scale factor directly
-  view->Initialize(nullptr /* parent */, current_apps_page);
+  view->Initialize(nullptr /* parent */, current_apps_page, false, false);
 
   view->MaybeSetAnchorPoint(
       GetCenterOfDisplay(display_id, GetMinimumBoundsHeightForAppList(view)));