Fix ParamTraits::param_type for unsigned char

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>
@@ skipping 104 matching lines @@
     m->WriteBool(p);
   }
   static bool Read(const Message* m, PickleIterator* iter, param_type* r) {
     return m->ReadBool(iter, r);
   }
   IPC_EXPORT static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct IPC_EXPORT ParamTraits<unsigned char> {
-  typedef unsigned short param_type;
+  typedef unsigned char param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, PickleIterator* iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct IPC_EXPORT ParamTraits<unsigned short> {
   typedef unsigned short param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, PickleIterator* iter, param_type* r);
@@ skipping 738 matching lines @@
   template<typename TA, typename TB, typename TC, typename TD, typename TE>
   static void WriteReplyParams(Message* reply, TA a, TB b, TC c, TD d, TE e) {
     ReplyParam p(a, b, c, d, e);
     WriteParam(reply, p);
   }
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_