[heap] MemoryChunk cleanup

src/s390/macro-assembler-s390.cc

Index: src/s390/macro-assembler-s390.cc
diff --git a/src/s390/macro-assembler-s390.cc b/src/s390/macro-assembler-s390.cc
index 8b708de734cfa5e96104a6c71760f051fd81bb9e..05b74a02435143bf6524116d434c28d222b2709c 100644
--- a/src/s390/macro-assembler-s390.cc
+++ b/src/s390/macro-assembler-s390.cc
@@ -251,10 +251,7 @@ void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index,
 void MacroAssembler::InNewSpace(Register object, Register scratch,
                                 Condition cond, Label* branch) {
   DCHECK(cond == eq || cond == ne);
-  // TODO(joransiu): check if we can merge mov Operand into AndP.
-  const int mask =
-      (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE);
-  CheckPageFlag(object, scratch, mask, cond, branch);
+  CheckPageFlag(object, scratch, MemoryChunk::kIsInNewSpaceMask, cond, branch);
 }
 
 void MacroAssembler::RecordWriteField(