Make NotifyHeadersComplete the last call in the function.

BUG=82903
Review URL: http://codereview.chromium.org/7038017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85719 0039d316-1c4b-4281-b951-d872f2087c98
bool BlobURLRequestJob::ReadLoop(int* bytes_read) {
  while (remaining_bytes_ > 0 && read_buf_remaining_bytes_ > 0) {
    if (!ReadItem())
      return false;
  }

  *bytes_read = ReadCompleted();
  return true;
}

bool BlobURLRequestJob::ReadLoop(int* bytes_read) {
  while (remaining_bytes_ > 0 && read_buf_remaining_bytes_ > 0) {
    if (!ReadItem())
      return false;
  }

  *bytes_read = ReadCompleted();
  return true;
}
