[V8] Run clang-tidy performance-for-range-copy check on src/

src/compilation-statistics.cc

Index: src/compilation-statistics.cc
diff --git a/src/compilation-statistics.cc b/src/compilation-statistics.cc
index 654807cc31c35419880177ef0edb093af732fc97..16ab3b37fe31d662c9f2182515e14c4d6e90933b 100644
--- a/src/compilation-statistics.cc
+++ b/src/compilation-statistics.cc
@@ -134,10 +134,10 @@ std::ostream& operator<<(std::ostream& os, const AsPrintableStatistics& ps) {
   }
 
   if (!ps.machine_output) WriteHeader(os);
-  for (auto phase_kind_it : sorted_phase_kinds) {
+  for (const auto& phase_kind_it : sorted_phase_kinds) {
     const auto& phase_kind_name = phase_kind_it->first;
     if (!ps.machine_output) {
-      for (auto phase_it : sorted_phases) {
+      for (const auto& phase_it : sorted_phases) {
         const auto& phase_stats = phase_it->second;
         if (phase_stats.phase_kind_name_ != phase_kind_name) continue;
         const auto& phase_name = phase_it->first;