Hook up the FocusController behind a flag.

ash/wm/workspace_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 ASH_WM_WORKSPACE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/workspace/workspace_types.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
-#include "ui/aura/client/activation_change_observer.h"
+#include "ui/views/corewm/activation_change_shim.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 namespace internal {
 
 class ShelfLayoutManager;
 class WorkspaceControllerTestHelper;
 class WorkspaceCycler;
 class WorkspaceEventHandler;
 class WorkspaceManager;
 
 // WorkspaceController acts as a central place that ties together all the
 // various workspace pieces.
 class ASH_EXPORT WorkspaceController
-    : public aura::client::ActivationChangeObserver {
+    : public views::corewm::ActivationChangeShim {
  public:
   explicit WorkspaceController(aura::Window* viewport);
   virtual ~WorkspaceController();
 
   // Returns the current window state.
   WorkspaceWindowState GetWindowState() const;
 
   void SetShelf(ShelfLayoutManager* shelf);
 
   // Sets the active workspace based on |window|.
@@ skipping 20 matching lines @@
   // finger vertical scroll.
   scoped_ptr<WorkspaceCycler> workspace_cycler_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_CONTROLLER_H_