Remove #pragma once from content

content/public/common/common_param_traits.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.
 
 // This file is used to define IPC::ParamTraits<> specializations for a number
 // of types so that they can be serialized over IPC.  IPC::ParamTraits<>
 // specializations for basic types (like int and std::string) and types in the
 // 'base' project can be found in ipc/ipc_message_utils.h.  This file contains
 // specializations for types that are used by the content code, and which need
 // manual serialization code.  This is usually because they're not structs with
 // public members, or because the same type is being used in multiple
 // *_messages.h headers.
 
 #ifndef CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_
 #define CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_
-#pragma once
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "content/public/common/common_param_traits_macros.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_utils.h"
 #include "net/base/ip_endpoint.h"
 #include "net/url_request/url_request_status.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/surface/transport_dib.h"
@@ skipping 190 matching lines @@
   // Note: This function expects parameter |r| to be of type &SkBitmap since
   // r->SetConfig() and r->SetPixels() are called.
   static bool Read(const Message* m, PickleIterator* iter, param_type* r);
 
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_