Remove #pragma once from ash

ash/test/launcher_view_test_api.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_TEST_LAUNCHER_VIEW_TEST_API_H_
 #define ASH_TEST_LAUNCHER_VIEW_TEST_API_H_
-#pragma once
 
 #include "base/basictypes.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ash {
 
 namespace internal {
@@ skipping 34 matching lines @@
  private:
   internal::LauncherView* launcher_view_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherViewTestAPI);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_LAUNCHER_VIEW_TEST_API_H_