Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/pepper_file_messages.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "content/common/pepper_file_messages.h"
 
 namespace IPC {
 
 void ParamTraits<webkit::ppapi::PepperFilePath>::Write(Message* m,
                                                        const param_type& p) {
   WriteParam(m, static_cast<unsigned>(p.domain()));
   WriteParam(m, p.path());
 }
 
 bool ParamTraits<webkit::ppapi::PepperFilePath>::Read(const Message* m,
-                                                      void** iter,
+                                                      PickleIterator* iter,
                                                       param_type* p) {
   unsigned domain;
   FilePath path;
   if (!ReadParam(m, iter, &domain) || !ReadParam(m, iter, &path))
     return false;
   if (domain > webkit::ppapi::PepperFilePath::DOMAIN_MAX_VALID)
     return false;
 
   *p = webkit::ppapi::PepperFilePath(
       static_cast<webkit::ppapi::PepperFilePath::Domain>(domain), path);
   return true;
 }
 
 void ParamTraits<webkit::ppapi::PepperFilePath>::Log(const param_type& p,
                                                      std::string* l) {
   l->append("(");
   LogParam(static_cast<unsigned>(p.domain()), l);
   l->append(", ");
   LogParam(p.path(), l);
   l->append(")");
 }
 
 }  // namespace IPC