Remove #pragma once from content

content/browser/accessibility/browser_accessibility_manager.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
-#pragma once
 
 #include <vector>
 
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "content/common/accessibility_node_data.h"
 #include "content/common/content_export.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ skipping 165 matching lines @@
   // we use internally here.
   base::hash_map<int32, int32> renderer_id_to_child_id_map_;
 
   // A mapping from child IDs to BrowserAccessibility objects.
   base::hash_map<int32, BrowserAccessibility*> child_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_