message: Added TPU code for FTRL with multiply_linear_by_lr setting (CPU and GPU
  versions already added).
diff: @@ -86,6 +86,7 @@ message FtrlParameters {
  float lr_power = 3;
  float initial_accum = 4;
  float initial_linear = 5;
  + bool multiply_linear_by_lr = 6;
  }
  // The Adam optimizer does not implement hyper-parameter update; use the dynamic
  