Remove Pickle::WriteSize() now that it has no remaining callers.

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_
 #pragma once
 
 #include <algorithm>
 #include <map>
@@ skipping 210 matching lines @@
                    param_type* r) {
     return m->ReadInt(iter, reinterpret_cast<int*>(r));
   }
   IPC_EXPORT static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct ParamTraits<long> {
   typedef long param_type;
   static void Write(Message* m, const param_type& p) {
-    m->WriteLong(p);
+    m->WriteLongUsingDangerousNonPortableLessPersistableForm(p);
   }
   static bool Read(const Message* m, PickleIterator* iter,
                    param_type* r) {
     return m->ReadLong(iter, r);
   }
   IPC_EXPORT static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct ParamTraits<unsigned long> {
   typedef unsigned long param_type;
   static void Write(Message* m, const param_type& p) {
-    m->WriteLong(p);
+    m->WriteLongUsingDangerousNonPortableLessPersistableForm(p);
   }
   static bool Read(const Message* m, PickleIterator* iter,
                    param_type* r) {
     return m->ReadLong(iter, reinterpret_cast<long*>(r));
   }
   IPC_EXPORT static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct ParamTraits<long long> {
@@ skipping 909 matching lines @@
     ReplyParam p(a, b, c, d, e);
     WriteParam(reply, p);
   }
 };
 
 //-----------------------------------------------------------------------------
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_