Remove #pragma once from content

content/public/common/webkit_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 WebKit 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_WEBKIT_PARAM_TRAITS_H_
 #define CONTENT_PUBLIC_COMMON_WEBKIT_PARAM_TRAITS_H_
-#pragma once
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_message_utils.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextDirection.h"
 #include "webkit/blob/blob_data.h"
 #include "webkit/glue/npruntime_util.h"
@@ skipping 219 matching lines @@
 struct CONTENT_EXPORT ParamTraits<webkit::forms::PasswordForm> {
   typedef webkit::forms::PasswordForm param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CONTENT_PUBLIC_COMMON_WEBKIT_PARAM_TRAITS_H_