Reset the app list when it is shown on Windows and Linux.

ui/app_list/views/app_list_main_view.cc

Index: ui/app_list/views/app_list_main_view.cc
diff --git a/ui/app_list/views/app_list_main_view.cc b/ui/app_list/views/app_list_main_view.cc
index 1e83d640c0b607bcaec789c73c2ea08837435209..568c2175a4d2cdb9b84417c2836d90c7ce8db1b4 100644
--- a/ui/app_list/views/app_list_main_view.cc
+++ b/ui/app_list/views/app_list_main_view.cc
@@ -20,6 +20,7 @@
 #include "ui/app_list/pagination_model.h"
 #include "ui/app_list/search_box_model.h"
 #include "ui/app_list/views/app_list_item_view.h"
+#include "ui/app_list/views/apps_container_view.h"
 #include "ui/app_list/views/contents_switcher_view.h"
 #include "ui/app_list/views/contents_view.h"
 #include "ui/app_list/views/search_box_view.h"
@@ -137,6 +138,13 @@ void AppListMainView::ShowAppListWhenReady() {
       this, &AppListMainView::OnIconLoadingWaitTimer);
 }
 
+void AppListMainView::ResetForShow() {
+  contents_view_->apps_container_view()->ResetForShow();
+  // We clear the search when hiding so when app list appears it is not showing
+  // search results.
+  search_box_view_->ClearSearch();
+}
+
 void AppListMainView::Close() {
   icon_loading_wait_timer_.Stop();
   contents_view_->CancelDrag();