message: Fix static comment in OpLevelCostEstimator to avoid confusion.
diff: @@ -661,6 +661,7 @@ int64 OpLevelCostEstimator::CountConv2DOperations(
  }
  // Helper to translate the positional arguments into named fields.
  +/* static */
  OpLevelCostEstimator::ConvolutionDimensions
  OpLevelCostEstimator::ConvolutionDimensionsFromInputs(
  const TensorShapeProto& original_image_shape,
  @@ -2022,7 +2023,6 @@ Costs OpLevelCostEstimator::PredictFusedBatchNormGrad(
  return costs;
  }
  -/* static */
  void OpLevelCostEstimator::CombineCostsAndUpdateExecutionTime(
  Costs* costs) const {
  if (compute_memory_overlap_) {
  