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
bool ParamTraits<HANDLE>::Read(const Message* m, PickleIterator* iter,
                               param_type* r) {
  uint32 temp;
  if (!m->ReadUInt32(iter, &temp))
    return false;
  *r = reinterpret_cast<HANDLE>(temp);
  return true;
}

bool ParamTraits<HANDLE>::Read(const Message* m, PickleIterator* iter,
                               param_type* r) {
  uint32 temp;
  if (!m->ReadUInt32(iter, &temp))
    return false;
  *r = reinterpret_cast<HANDLE>(temp);
  return true;
}
