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

trunk/src/ash/shell_delegate.h

Index: trunk/src/ash/shell_delegate.h
===================================================================
--- trunk/src/ash/shell_delegate.h	(revision 255397)
+++ trunk/src/ash/shell_delegate.h	(working copy)
@@ -19,7 +19,10 @@
 namespace aura {
 class RootWindow;
 class Window;
+namespace client {
+class UserActionClient;
 }
+}
 
 namespace content {
 class BrowserContext;
@@ -120,6 +123,9 @@
   // Creates a media delegate. Shell takes ownership of the delegate.
   virtual MediaDelegate* CreateMediaDelegate() = 0;
 
+  // Creates a user action client. Shell takes ownership of the object.
+  virtual aura::client::UserActionClient* CreateUserActionClient() = 0;
+
   // Creates a menu model of the context for the |root_window|.
   // When a ContextMenu is used for an item created by ShelfWindowWatcher,
   // passes its ShelfItemDelegate and ShelfItem.