[heap] Remove unused step_size_in_bytes in AdvanceIncrementalMarking.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 07c361f19fa0afe87c3c1df31e4083dd9f80907f..76c1248e12701a88e3140f8077daeda1ef7153ee 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -928,7 +928,7 @@ void Heap::ReportExternalMemoryPressure(const char* gc_reason) {
     double deadline = MonotonicallyIncreasingTimeInMs() +
                       FLAG_external_allocation_limit_incremental_time;
     incremental_marking()->AdvanceIncrementalMarking(
-        0, deadline,
+        deadline,
         IncrementalMarking::StepActions(IncrementalMarking::GC_VIA_STACK_GUARD,
                                         IncrementalMarking::FORCE_MARKING,
                                         IncrementalMarking::FORCE_COMPLETION));