[Tracing] Use TracingCategoryObserver in runtime statistics

src/counters-inl.h

Index: src/counters-inl.h
diff --git a/src/counters-inl.h b/src/counters-inl.h
index 303e5e3a81de72aff55d2579b106399037cb7128..2001586ac6fbd8627bc8f2fcff8964c42e825d29 100644
--- a/src/counters-inl.h
+++ b/src/counters-inl.h
@@ -12,16 +12,14 @@ namespace internal {
 
 RuntimeCallTimerScope::RuntimeCallTimerScope(
     Isolate* isolate, RuntimeCallStats::CounterId counter_id) {
-  if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-                  FLAG_runtime_call_stats)) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     Initialize(isolate, counter_id);
   }
 }
 
 RuntimeCallTimerScope::RuntimeCallTimerScope(
     HeapObject* heap_object, RuntimeCallStats::CounterId counter_id) {
-  if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-                  FLAG_runtime_call_stats)) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     Initialize(heap_object->GetIsolate(), counter_id);
   }
 }