Stub in more IPC attachment brokering functionality.

ipc/ipc_message_utils.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 IPC_IPC_MESSAGE_UTILS_H_
 #define IPC_IPC_MESSAGE_UTILS_H_
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/containers/small_map.h"
 #include "base/files/file.h"
 #include "base/format_macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/tuple.h"
+#include "ipc/brokerable_attachment.h"
 #include "ipc/ipc_message_start.h"
 #include "ipc/ipc_param_traits.h"
 #include "ipc/ipc_sync_message.h"
 
 #if defined(COMPILER_GCC)
 // GCC "helpfully" tries to inline template methods in release mode. Except we
 // want the majority of the template junk being expanded once in the
 // implementation file (and only provide the definitions in
 // ipc_message_utils_impl.h in those files) and exported, instead of expanded
 // at every call site. Special note: GCC happily accepts the attribute before
@@ skipping 392 matching lines @@
   }
   static void Log(const param_type& p, std::string* l) {
     l->append("(");
     LogParam(p.first, l);
     l->append(", ");
     LogParam(p.second, l);
     l->append(")");
   }
 };
 
+// IPC ParamTraits -------------------------------------------------------------
+template <>
+struct IPC_EXPORT ParamTraits<BrokerableAttachment::AttachmentId> {
+  typedef BrokerableAttachment::AttachmentId param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 // Base ParamTraits ------------------------------------------------------------
 
 template <>
 struct IPC_EXPORT ParamTraits<base::DictionaryValue> {
   typedef base::DictionaryValue param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
@@ skipping 565 matching lines @@
   template <typename... Ts>
   static void WriteReplyParams(Message* reply, Ts... args) {
     ReplyParam p(args...);
     WriteParam(reply, p);
   }
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_