chromeos: Rename ash::WmShelf to Shelf

ash/app_list/app_list_delegate_impl.cc

Index: ash/app_list/app_list_delegate_impl.cc
diff --git a/ash/app_list/app_list_delegate_impl.cc b/ash/app_list/app_list_delegate_impl.cc
index d179b03d8c2db42f1c65d37d364560ca98c7c9fa..c8fbf0f0edde5c4af59d8358fb5f6e6c17f0016b 100644
--- a/ash/app_list/app_list_delegate_impl.cc
+++ b/ash/app_list/app_list_delegate_impl.cc
@@ -6,8 +6,8 @@
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/app_list_button.h"
+#include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_widget.h"
-#include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
 #include "ash/wm_window.h"
@@ -28,7 +28,7 @@ void AppListDelegateImpl::OnAppListVisibilityChanged(bool visible,
   aura::Window* root_window =
       ShellPort::Get()->GetRootWindowForDisplayId(display_id);
   AppListButton* app_list_button =
-      WmShelf::ForWindow(root_window)->shelf_widget()->GetAppListButton();
+      Shelf::ForWindow(root_window)->shelf_widget()->GetAppListButton();
   if (!app_list_button)
     return;