[Heap] Remove concept of MarkingParity.

src/s390/codegen-s390.cc

Index: src/s390/codegen-s390.cc
diff --git a/src/s390/codegen-s390.cc b/src/s390/codegen-s390.cc
index 43aaaee0a491955af222bcfcae233126dbeeb22a..a7c382e39ea0f408c03a69b319439df6bed2a011 100644
--- a/src/s390/codegen-s390.cc
+++ b/src/s390/codegen-s390.cc
@@ -187,29 +187,27 @@ bool Code::IsYoungSequence(Isolate* isolate, byte* sequence) {
   return result;
 }
 
-void Code::GetCodeAgeAndParity(Isolate* isolate, byte* sequence, Age* age,
-                               MarkingParity* parity) {
+Code::Age Code::GetCodeAge(Isolate* isolate, byte* sequence) {
   if (IsYoungSequence(isolate, sequence)) {
-    *age = kNoAgeCodeAge;
-    *parity = NO_MARKING_PARITY;
+    return kNoAgeCodeAge;
   } else {
     Code* code = NULL;
     Address target_address =
         Assembler::target_address_at(sequence + kCodeAgingTargetDelta, code);
     Code* stub = GetCodeFromTargetAddress(target_address);
-    GetCodeAgeAndParity(stub, age, parity);
+    return GetAgeOfCodeAgeStub(stub);
   }
 }
 
-void Code::PatchPlatformCodeAge(Isolate* isolate, byte* sequence, Code::Age age,
-                                MarkingParity parity) {
+void Code::PatchPlatformCodeAge(Isolate* isolate, byte* sequence,
+                                Code::Age age) {
   uint32_t young_length = isolate->code_aging_helper()->young_sequence_length();
   if (age == kNoAgeCodeAge) {
     isolate->code_aging_helper()->CopyYoungSequenceTo(sequence);
     Assembler::FlushICache(isolate, sequence, young_length);
   } else {
     // FIXED_SEQUENCE
-    Code* stub = GetCodeAgeStub(isolate, age, parity);
+    Code* stub = GetCodeAgeStub(isolate, age);
     CodePatcher patcher(isolate, sequence, young_length);
     intptr_t target = reinterpret_cast<intptr_t>(stub->instruction_start());
     // We need to push lr on stack so that GenerateMakeCodeYoungAgainCommon