message: Make registration macro namespace-agnostic
diff: @@ -133,10 +133,11 @@ class OptimizationPassRegistration {
  REGISTER_OPTIMIZATION_UNIQ(ctr, grouping, phase, optimization)
  #define REGISTER_OPTIMIZATION_UNIQ(ctr, grouping, phase, optimization) \
  - static optimization_registration::OptimizationPassRegistration \
  + static ::tensorflow::optimization_registration::OptimizationPassRegistration \
  register_optimization_##ctr( \
  grouping, phase, \
  - std::unique_ptr<GraphOptimizationPass>(new optimization()), \
  + ::std::unique_ptr<::tensorflow::GraphOptimizationPass>( \
  + new optimization()), \
  #optimization)
  } // namespace tensorflow
  