athena: Fix overview mode for split-view mode.

athena/wm/test/window_manager_impl_test_api.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 ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_
 #define ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_
 
 #include "base/macros.h"
 
 namespace athena {
 class SplitViewController;
 class WindowListProvider;
 class WindowManagerImpl;
 
 namespace test {
 
 class WindowManagerImplTestApi {
  public:
   WindowManagerImplTestApi();
   ~WindowManagerImplTestApi();
 
+  athena::WindowManagerImpl* wm() { return wm_; }
   athena::WindowListProvider* GetWindowListProvider();
   athena::SplitViewController* GetSplitViewController();
 
  private:
   athena::WindowManagerImpl* wm_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerImplTestApi);
 };
 
 }  // namespace test
 }  // namespace athena
 
 #endif  // ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_