Check if there is still time before finalizing an incremental collection.

src/heap/gc-idle-time-handler.h

Index: src/heap/gc-idle-time-handler.h
diff --git a/src/heap/gc-idle-time-handler.h b/src/heap/gc-idle-time-handler.h
index 15aaea668f8e98047e78176642d5d2d2667adc04..edd5e42e263e356579d5b7568fc970a863dace16 100644
--- a/src/heap/gc-idle-time-handler.h
+++ b/src/heap/gc-idle-time-handler.h
@@ -155,7 +155,11 @@ class GCIdleTimeHandler {
   static size_t EstimateMarkCompactTime(
       size_t size_of_objects, size_t mark_compact_speed_in_bytes_per_ms);
 
-  static bool DoScavenge(
+  static bool ShouldDoMarkCompact(size_t idle_time_in_ms,
+                                  size_t size_of_objects,
+                                  size_t mark_compact_speed_in_bytes_per_ms);
+
+  static bool ShouldDoScavenge(
       size_t idle_time_in_ms, size_t new_space_size, size_t used_new_space_size,
       size_t scavenger_speed_in_bytes_per_ms,
       size_t new_space_allocation_throughput_in_bytes_per_ms);