Focus launcher if spoken feedback is enabled and no other windows visible.

ash/wm/ash_activation_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_ASH_ACTIVATION_CONTROLLER_H_
 #define ASH_WM_ASH_ACTIVATION_CONTROLLER_H_
 
+#include "ash/ash_export.h"
 #include "ash/wm/activation_controller_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/basictypes.h"
 
 namespace ash {
 namespace internal {
 
-class AshActivationController : public ActivationControllerDelegate {
+class ASH_EXPORT AshActivationController : public ActivationControllerDelegate {
  public:
   AshActivationController();
   virtual ~AshActivationController();
 
  private:
   // Overridden from ActivationControllerDelegate:
   virtual aura::Window* WillActivateWindow(aura::Window* window) OVERRIDE;
   virtual aura::Window* WillFocusWindow(aura::Window* window) OVERRIDE;
 
+  // Returns a handle to the launcher on the active root window which will
+  // be activated as fallback. Also notifies the launcher, so it can return
+  // true from Launcher::CanActivate().
+  aura::Window* PrepareToActivateLauncher();
+
   DISALLOW_COPY_AND_ASSIGN(AshActivationController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_ASH_ACTIVATION_CONTROLLER_H_