message: Print warning when profiler->Start returns with error message.
diff: @@ -177,7 +177,11 @@ ProfilerSession::ProfilerSession(ProfilerContext* const context)
  status_ = Status::OK();
  for (auto& profiler : profilers_) {
  - profiler->Start().IgnoreError();
  + auto start_status = profiler->Start();
  + if (!start_status.ok()) {
  + LOG(WARNING) << "Encountered error while starting profiler: "
  + << start_status.ToString();
  + }
  }
  }
  