Hook up the FocusController behind a flag.

chrome/browser/ui/ash/launcher/shell_window_launcher_controller.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_ASH_LAUNCHER_SHELL_WINDOW_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_SHELL_WINDOW_LAUNCHER_CONTROLLER_H_
 
 #include <list>
 #include <map>
 #include <string>
 
 #include "chrome/browser/extensions/shell_window_registry.h"
-#include "ui/aura/client/activation_change_observer.h"
 #include "ui/aura/window_observer.h"
+#include "ui/views/corewm/activation_change_shim.h"
 
 namespace aura {
 
 class Window;
 
 namespace client {
 class ActivationClient;
 }
 
 }
 
 class ChromeLauncherController;
 class LauncherItemController;
 class ShellWindow;
 
 // ShellWindowLauncherController observes the Shell Window registry and the
 // aura window manager. It handles adding and removing launcher items from
 // ChromeLauncherController.
 class ShellWindowLauncherController
     : public extensions::ShellWindowRegistry::Observer,
       public aura::WindowObserver,
-      public aura::client::ActivationChangeObserver {
+      public views::corewm::ActivationChangeShim {
  public:
   explicit ShellWindowLauncherController(ChromeLauncherController* owner);
   virtual ~ShellWindowLauncherController();
 
   // Overridden from ShellWindowRegistry::Observer:
   virtual void OnShellWindowAdded(ShellWindow* shell_window) OVERRIDE;
   virtual void OnShellWindowRemoved(ShellWindow* shell_window) OVERRIDE;
 
   // Overriden from aura::WindowObserver:
   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
@@ skipping 17 matching lines @@
   // Map of app launcher id to controller.
   AppControllerMap app_controller_map_;
 
   // Allows us to get from an aura::Window to the app launcher id.
   WindowToAppLauncherIdMap window_to_app_launcher_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellWindowLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_SHELL_WINDOW_LAUNCHER_CONTROLLER_H_