message: Backout FIFO depth change
  Summary: This reverts commit
  Test Plan: revert-hammer
  Reviewers:
  Subscribers:
diff: @@ -110,7 +110,7 @@ class InfeedQueue {
  }
  private:
  - SPSCQueue<T, 2048> queue_;
  + SPSCQueue<T, 32> queue_;
  static constexpr T kEndOfQueueSentinel{nullptr};
  TF_DISALLOW_COPY_AND_ASSIGN(InfeedQueue);
  };
  