Track how much we miss the idle notification limit

src/counters.h

Index: src/counters.h
diff --git a/src/counters.h b/src/counters.h
index ed9f8a89aeb17115e90f17d6b629eae2c520908d..1aeb943dc20b35b6b52ccc0b446cb1ae12d59b3b 100644
--- a/src/counters.h
+++ b/src/counters.h
@@ -291,9 +291,11 @@ class HistogramTimerScope BASE_EMBEDDED {
 #endif
 };
 
-#define HISTOGRAM_RANGE_LIST(HR) \
-  /* Generic range histograms */ \
-  HR(gc_idle_time_allotted_in_ms, V8.GCIdleTimeAllottedInMS, 0, 10000, 101)
+#define HISTOGRAM_RANGE_LIST(HR)                                              \
+  /* Generic range histograms */                                              \
+  HR(gc_idle_time_allotted_in_ms, V8.GCIdleTimeAllottedInMS, 0, 10000, 101)   \
+  HR(gc_idle_time_limit_overshot, V8.GCIdleTimeLimit.Overshot, 0, 10000, 101) \
+  HR(gc_idle_time_limit_undershot, V8.GCIdleTimeLimi.Undershot, 0, 10000, 101)
 
 #define HISTOGRAM_TIMER_LIST(HT)                             \
   /* Garbage collection timers. */                           \