Revert 255385 "aura: Remove client::UserActionClient."

trunk/src/ash/shell.h

Index: trunk/src/ash/shell.h
===================================================================
--- trunk/src/ash/shell.h	(revision 255397)
+++ trunk/src/ash/shell.h	(working copy)
@@ -40,6 +40,7 @@
 namespace client {
 class ActivationClient;
 class FocusClient;
+class UserActionClient;
 }
 }
 namespace chromeos {
@@ -665,6 +666,7 @@
   scoped_ptr<PartialMagnificationController> partial_magnification_controller_;
   scoped_ptr<AutoclickController> autoclick_controller_;
   scoped_ptr<aura::client::FocusClient> focus_client_;
+  scoped_ptr<aura::client::UserActionClient> user_action_client_;
   aura::client::ActivationClient* activation_client_;
   scoped_ptr<internal::MouseCursorEventFilter> mouse_cursor_filter_;
   scoped_ptr<internal::ScreenPositionController> screen_position_controller_;