Make AudioParameters a class instead of a struct

content/public/common/common_param_traits.h

 // Copyright (c) 2011 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..
 
 #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 "base/platform_file.h"
 #include "content/common/content_export.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/security_style.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_utils.h"
+#include "media/audio/audio_parameters.h"
 #include "net/base/ip_endpoint.h"
 #include "net/url_request/url_request_status.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/surface/transport_dib.h"
 #include "webkit/glue/resource_type.h"
 
 class SkBitmap;
 
 namespace gfx {
 class Point;
@@ skipping 95 matching lines @@
 
 template <>
 struct CONTENT_EXPORT ParamTraits<gfx::Rect> {
   typedef gfx::Rect param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template <>
+struct CONTENT_EXPORT ParamTraits<AudioParameters> {
+  typedef AudioParameters param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
 struct ParamTraits<gfx::NativeWindow> {
   typedef gfx::NativeWindow param_type;
   static void Write(Message* m, const param_type& p) {
 #if defined(OS_WIN)
     // HWNDs are always 32 bits on Windows, even on 64 bit systems.
     m->WriteUInt32(reinterpret_cast<uint32>(p));
 #else
     m->WriteData(reinterpret_cast<const char*>(&p), sizeof(p));
 #endif
   }
@@ skipping 89 matching lines @@
 };
 
 template <>
 struct SimilarTypeTraits<content::SecurityStyle> {
   typedef int Type;
 };
 
 }  // namespace IPC
 
 #endif  // CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_