Validate that paths don't contain embedded NULLs at deserialization.

BUG=166867

Review URL: https://chromiumcodereview.appspot.com/11743009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@174935 0039d316-1c4b-4281-b951-d872f2087c98
void ParamTraits<IPC::ChannelHandle>::Write(Message* m, const param_type& p) {
#if defined(OS_WIN)
  DCHECK(p.pipe.handle == NULL);
#endif  // defined (OS_WIN)
  WriteParam(m, p.name);
#if defined(OS_POSIX)
  WriteParam(m, p.socket);
#endif
}

void ParamTraits<IPC::ChannelHandle>::Write(Message* m, const param_type& p) {
#if defined(OS_WIN)
  DCHECK(p.pipe.handle == NULL);
#endif  // defined (OS_WIN)
  WriteParam(m, p.name);
#if defined(OS_POSIX)
  WriteParam(m, p.socket);
#endif
}
