message: Use DOT interface instead of graphdef interface
diff: @@ -66,7 +66,7 @@ limitations under the License.
  #include "tensorflow/compiler/xla/service/hlo_pass_fix.h"
  #include "tensorflow/compiler/xla/service/hlo_pass_pipeline.h"
  #include "tensorflow/compiler/xla/service/hlo_subcomputation_unification.h"
  -#include "tensorflow/compiler/xla/service/hlo_tfgraph_builder.h"
  +#include "tensorflow/compiler/xla/service/hlo_graph_dumper.h"
  #include "tensorflow/compiler/xla/service/map_inliner.h"
  #include "tensorflow/compiler/xla/service/reshape_mover.h"
  #include "tensorflow/compiler/xla/service/sort_simplifier.h"
  @@ -231,7 +231,7 @@ bool AreAllOutputsParameters(
  static std::string SerializeComputationToGraphDef(const HloComputation& comp) {
  std::string buffer;
  - hlo_graph_dumper::HloTfGraphBuilder builder;
  + hlo_graph_dumper::HloDotDumper builder;
  TF_CHECK_OK(builder.AddComputation(comp));
  builder.GetGraphDef().SerializeToString(&buffer);
  return buffer;
  