Don't allow '\0' characters in FilePath.

ipc/ipc_message_utils.cc

 // 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 "ipc/ipc_message_utils.h"
 
 #include "base/file_path.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/nullable_string16.h"
@@ skipping 471 matching lines @@
                                             std::string* l) {
   if (p.auto_close) {
     l->append(StringPrintf("FD(%d auto-close)", p.fd));
   } else {
     l->append(StringPrintf("FD(%d)", p.fd));
   }
 }
 #endif  // defined(OS_POSIX)
 
 void ParamTraits<FilePath>::Write(Message* m, const param_type& p) {
-  ParamTraits<FilePath::StringType>::Write(m, p.value());
+  p.WriteToPickle(m);
 }
 
 bool ParamTraits<FilePath>::Read(const Message* m,
                                  PickleIterator* iter,
                                  param_type* r) {
-  FilePath::StringType value;
-  if (!ParamTraits<FilePath::StringType>::Read(m, iter, &value))
-    return false;
-  // Reject embedded NULs as they can cause security checks to go awry.
-  if (value.find(FILE_PATH_LITERAL('\0')) != FilePath::StringType::npos)
-    return false;
-  *r = FilePath(value);
-  return true;
+  return r->ReadFromPickle(iter);
 }
 
 void ParamTraits<FilePath>::Log(const param_type& p, std::string* l) {
   ParamTraits<FilePath::StringType>::Log(p.value(), l);
 }
 
 void ParamTraits<ListValue>::Write(Message* m, const param_type& p) {
   WriteValue(m, &p, 0);
 }
 
@@ skipping 305 matching lines @@
   return result;
 }
 
 void ParamTraits<MSG>::Log(const param_type& p, std::string* l) {
   l->append("<MSG>");
 }
 
 #endif  // OS_WIN
 
 }  // namespace IPC