[heap] Remove unused step_size_in_bytes in AdvanceIncrementalMarking.

test/cctest/heap/test-heap.cc

Index: test/cctest/heap/test-heap.cc
diff --git a/test/cctest/heap/test-heap.cc b/test/cctest/heap/test-heap.cc
index a381950757830cddb65da624307b8cc022936f9f..784c8f0fb6a5beaf4e3db40c30c443f49fe4f310 100644
--- a/test/cctest/heap/test-heap.cc
+++ b/test/cctest/heap/test-heap.cc
@@ -4644,7 +4644,7 @@ TEST(LargeObjectSlotRecording) {
   // Start incremental marking to active write barrier.
   SimulateIncrementalMarking(heap, false);
   heap->incremental_marking()->AdvanceIncrementalMarking(
-      10000000, 10000000, IncrementalMarking::IdleStepActions());
+      10000000, IncrementalMarking::IdleStepActions());
 
   // Create references from the large object to the object on the evacuation
   // candidate.