[heap] Remove black pages and use black areas instead.

src/heap/heap-inl.h

Index: src/heap/heap-inl.h
diff --git a/src/heap/heap-inl.h b/src/heap/heap-inl.h
index 25400dd261c704b02a7decb25f8a56990fdb1592..a12c6d031c389310a6be506245cb929b4efec413 100644
--- a/src/heap/heap-inl.h
+++ b/src/heap/heap-inl.h
@@ -252,11 +252,6 @@ AllocationResult Heap::AllocateRaw(int size_in_bytes, AllocationSpace space,
     old_gen_exhausted_ = true;
   }
 
-  if (!old_gen_exhausted_ && incremental_marking()->black_allocation() &&
-      space != OLD_SPACE) {
-    Marking::MarkBlack(ObjectMarking::MarkBitFrom(object));
-    MemoryChunk::IncrementLiveBytesFromGC(object, size_in_bytes);
-  }
   return allocation;
 }