Internal cleanup
PiperOrigin-RevId: 489075734
diff --git a/src/google/protobuf/arena_impl.h b/src/google/protobuf/arena_impl.h
index 9d2de93..74106cd 100644
--- a/src/google/protobuf/arena_impl.h
+++ b/src/google/protobuf/arena_impl.h
@@ -117,39 +117,6 @@
using LifecycleIdAtomic = uint64_t;
-// MetricsCollector collects stats for a particular arena.
-class PROTOBUF_EXPORT ArenaMetricsCollector {
- public:
- ArenaMetricsCollector(bool record_allocs) : record_allocs_(record_allocs) {}
-
- // Invoked when the arena is about to be destroyed. This method will
- // typically finalize any metric collection and delete the collector.
- // space_allocated is the space used by the arena.
- virtual void OnDestroy(uint64_t space_allocated) = 0;
-
- // OnReset() is called when the associated arena is reset.
- // space_allocated is the space used by the arena just before the reset.
- virtual void OnReset(uint64_t space_allocated) = 0;
-
- // OnAlloc is called when an allocation happens.
- // type_info is promised to be static - its lifetime extends to
- // match program's lifetime (It is given by typeid operator).
- // Note: typeid(void) will be passed as allocated_type every time we
- // intentionally want to avoid monitoring an allocation. (i.e. internal
- // allocations for managing the arena)
- virtual void OnAlloc(const std::type_info* allocated_type,
- uint64_t alloc_size) = 0;
-
- // Does OnAlloc() need to be called? If false, metric collection overhead
- // will be reduced since we will not do extra work per allocation.
- bool RecordAllocs() { return record_allocs_; }
-
- protected:
- // This class is destructed by the call to OnDestroy().
- ~ArenaMetricsCollector() = default;
- const bool record_allocs_;
-};
-
enum class AllocationClient { kDefault, kArray };
class ThreadSafeArena;
