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<float>::Read(const Message* m, PickleIterator* iter,
                              param_type* r) {
  const char *data;
  int data_size;
  if (!m->ReadData(iter, &data, &data_size) ||
      data_size != sizeof(param_type)) {
    NOTREACHED();
    return false;
  }
  memcpy(r, data, sizeof(param_type));
  return true;
}

bool ParamTraits<float>::Read(const Message* m, PickleIterator* iter,
                              param_type* r) {
  const char *data;
  int data_size;
  if (!m->ReadData(iter, &data, &data_size) ||
      data_size != sizeof(param_type)) {
    NOTREACHED();
    return false;
  }
  memcpy(r, data, sizeof(param_type));
  return true;
}
