[heap] Buffer counter updates for new space evacuation.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 0bd763bc763b7d22826cbd0646ac4dd69860640b..a7e9a74a923d491396403b29514ce6fc0057dfc4 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -3101,8 +3101,7 @@ bool Heap::CanMoveObjectStart(HeapObject* object) {
 
 
 void Heap::AdjustLiveBytes(HeapObject* object, int by, InvocationMode mode) {
-  if (incremental_marking()->IsMarking() &&
-      Marking::IsBlack(Marking::MarkBitFrom(object->address()))) {
+  if (Marking::IsBlack(Marking::MarkBitFrom(object->address()))) {
     if (mode == SEQUENTIAL_TO_SWEEPER) {
       MemoryChunk::IncrementLiveBytesFromGC(object, by);
     } else {