Makes SetFocus() notify callback correctly on failure

components/mus/ws/window_tree.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_MUS_WS_WINDOW_TREE_H_
 #define COMPONENTS_MUS_WS_WINDOW_TREE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 129 matching lines @@
   bool SetWindowVisibility(const ClientWindowId& window_id, bool visible);
   bool SetFocus(const ClientWindowId& window_id);
   bool Embed(const ClientWindowId& window_id,
              mojom::WindowTreeClientPtr client);
   void DispatchInputEvent(ServerWindow* target, const ui::Event& event);
 
   bool IsWaitingForNewTopLevelWindow(uint32_t wm_change_id);
   void OnWindowManagerCreatedTopLevelWindow(uint32_t wm_change_id,
                                             uint32_t client_change_id,
                                             const ServerWindow* window);
+  void AddActivationParent(const ClientWindowId& window_id);
 
   // Calls through to the client.
   void OnChangeCompleted(uint32_t change_id, bool success);
   void OnAccelerator(uint32_t accelerator_id, const ui::Event& event);
 
   // The following methods are invoked after the corresponding change has been
   // processed. They do the appropriate bookkeeping and update the client as
   // necessary.
   void ProcessWindowBoundsChanged(const ServerWindow* window,
                                   const gfx::Rect& old_bounds,
@@ skipping 270 matching lines @@
 
   scoped_ptr<WaitingForTopLevelWindowInfo> waiting_for_top_level_window_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTree);
 };
 
 }  // namespace ws
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_WINDOW_TREE_H_