[heap] MemoryChunk cleanup

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 874fbae28b8e085058df95919e8e5bce9f33b234..523ec7c203c4619a38c8f8fe5a55d8c971af44ea 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -253,9 +253,8 @@ void MacroAssembler::InNewSpace(Register object,
                                 Condition cc,
                                 Label* branch,
                                 Label::Distance distance) {
-  const int mask =
-      (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE);
-  CheckPageFlag(object, scratch, mask, cc, branch, distance);
+  CheckPageFlag(object, scratch, MemoryChunk::kIsInNewSpaceMask, cc, branch,
+                distance);
 }