original.java
@Override protected void process(ByteBuffer bb) {
  int k1 = bb.getInt();
  len += 4;

  k1 *= c1;
  k1 = Integer.rotateLeft(k1, 15);
  k1 *= c2;

  h1 ^= k1;
  h1 = Integer.rotateLeft(h1, 13);
  h1 = h1 * 5 + 0xe6546b64;
}
modified.java
@Override protected void process(ByteBuffer bb) {
  int k1 = bb.getInt();
  len += CHUNK_SIZE;

  k1 *= C1;
  k1 = Integer.rotateLeft(k1, 15);
  k1 *= C2;

  h1 ^= k1;
  h1 = Integer.rotateLeft(h1, 13);
  h1 = h1 * 5 + 0xe6546b64;
}