message: [XLA:CPU/GPU] Adjust fusion heuristic to allow the fusing of Philox HLO
  expansion.
  Change the factor used by IsFusedIrEmitterInefficient from 8 to 15.
diff: @@ -295,9 +295,9 @@ bool FusedIrEmitter::IsFusedIrEmitterInefficient(
  total += entry.second;
  }
  - // Check that the code duplication has at most a factor of 8 (where 8 is an
  + // Check that the code duplication has at most a factor of 15 (where 15 is an
  // arbitrary constant that seems to work).
  - return total > 8 * index_usage_count.size();
  + return total > 15 * index_usage_count.size();
  }
  } // namespace xla
  