message: Dump convolution/matmul classifications
  Summary: Dump to VLOG(2)
  Test Plan: Run example locally
  Reviewers: georgep, jakeh, stephenm
diff: @@ -220,6 +220,13 @@ StatusOr<bool> ConvolutionClassifier::Run(HloModule* module) {
  }
  }
  + if (VLOG_IS_ON(2)) {
  + for (const auto& it : classification_) {
  + VLOG(2) << it.first->name() << " : "
  + << ConvClassificationTypeToString(it.second);
  + }
  + }
  +
  return true;
  }
  