Remove the animation delay for showing the top level apps when user opens app list launcher.

ui/app_list/views/apps_container_view.cc

Index: ui/app_list/views/apps_container_view.cc
diff --git a/ui/app_list/views/apps_container_view.cc b/ui/app_list/views/apps_container_view.cc
index ff117a0d5011560f7949da9b6cb3a188de0b1e72..e2aa3e2b6f86bbe221b3148e635209993744e358 100644
--- a/ui/app_list/views/apps_container_view.cc
+++ b/ui/app_list/views/apps_container_view.cc
@@ -24,7 +24,8 @@ AppsContainerView::AppsContainerView(AppListMainView* app_list_main_view,
                                      content::WebContents* start_page_contents)
     : model_(model),
       show_state_(SHOW_APPS),
-      top_icon_animation_pending_count_(0) {
+      top_icon_animation_pending_count_(0),
+      show_apps_with_animation_(false) {
   apps_grid_view_ = new AppsGridView(
       app_list_main_view, pagination_model, start_page_contents);
   apps_grid_view_->SetLayout(kPreferredIconDimension,
@@ -51,14 +52,14 @@ AppsContainerView::~AppsContainerView() {
 
 void AppsContainerView::ShowActiveFolder(AppListFolderItem* folder_item) {
   app_list_folder_view_->SetAppListFolderItem(folder_item);
-  SetShowState(SHOW_ACTIVE_FOLDER);
+  SetShowState(SHOW_ACTIVE_FOLDER, false);
 
   CreateViewsForFolderTopItemsAnimation(folder_item, true);
 }
 
 void AppsContainerView::ShowApps(AppListFolderItem* folder_item) {
   PrepareToShowApps(folder_item);
-  SetShowState(SHOW_APPS);
+  SetShowState(SHOW_APPS, true);
 }
 
 void AppsContainerView::SetDragAndDropHostOfCurrentAppList(
@@ -71,7 +72,7 @@ void AppsContainerView::SetDragAndDropHostOfCurrentAppList(
 void AppsContainerView::ReparentFolderItemTransit(
     AppListFolderItem* folder_item) {
   PrepareToShowApps(folder_item);
-  SetShowState(SHOW_ITEM_REPARENT);
+  SetShowState(SHOW_ITEM_REPARENT, false);
 }
 
 gfx::Size AppsContainerView::GetPreferredSize() {
@@ -91,9 +92,15 @@ void AppsContainerView::Layout() {
   switch (show_state_) {
     case SHOW_APPS:
       folder_background_view_->SetVisible(false);
-      app_list_folder_view_->ScheduleShowHideAnimation(false, false);
+      if (show_apps_with_animation_)
+        app_list_folder_view_->ScheduleShowHideAnimation(false, false);
+      else
+        app_list_folder_view_->HideViewImmediately();
       apps_grid_view_->SetBoundsRect(rect);
-      apps_grid_view_->ScheduleShowHideAnimation(true);
+      if (show_apps_with_animation_)
+        apps_grid_view_->ScheduleShowHideAnimation(true);
+      else
+        apps_grid_view_->SetVisible(true);

[xiyuan, 2014/02/13 22:53:42]

Can we move the animation and show/hide code into SetShowState? We probably
should not do this in Layout.

[jennyz, 2014/02/13 23:42:59]

Done.

       break;
     case SHOW_ACTIVE_FOLDER:
       folder_background_view_->SetBoundsRect(rect);
@@ -136,11 +143,13 @@ void AppsContainerView::OnTopIconAnimationsComplete() {
   }
 }
 
-void AppsContainerView::SetShowState(ShowState show_state) {
+void AppsContainerView::SetShowState(ShowState show_state,
+                                     bool show_apps_with_animation) {
   if (show_state_ == show_state)
     return;
 
   show_state_ = show_state;
+  show_apps_with_animation_ = show_apps_with_animation;
   Layout();
 }