Move app list search box into AppListView.

ui/app_list/views/app_list_view.h

Index: ui/app_list/views/app_list_view.h
diff --git a/ui/app_list/views/app_list_view.h b/ui/app_list/views/app_list_view.h
index 0ee715a42c4a95ae834f1d93978dfe065a1d08fe..9f75a377bfa498f551fe6b25a66a309c2fd96f95 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -11,6 +11,7 @@
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/speech_ui_model_observer.h"
+#include "ui/app_list/views/search_box_view.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/widget/widget.h"
 
@@ -34,6 +35,7 @@ class AppListViewDelegate;
 class AppListViewObserver;
 class HideViewAnimationObserver;
 class PaginationModel;
+class SearchBoxView;
 class SpeechView;
 
 // AppListView is the top-level view and controller of app list UI. It creates
@@ -160,6 +162,7 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
   AppListViewDelegate* delegate_;  // Weak. Owned by AppListService.
 
   AppListMainView* app_list_main_view_;
+  SearchBoxView* search_box_view_;
   SpeechView* speech_view_;
 
   // The red "experimental" banner for the experimental app list.