[Heap] Remove concept of MarkingParity.

src/ppc/codegen-ppc.cc

Index: src/ppc/codegen-ppc.cc
diff --git a/src/ppc/codegen-ppc.cc b/src/ppc/codegen-ppc.cc
index 48f0c75bc166a49d5631fc36f53a143862d9b3a8..bb365b4e632b56ad25729d71f7e55ca3b5b2ffae 100644
--- a/src/ppc/codegen-ppc.cc
+++ b/src/ppc/codegen-ppc.cc
@@ -195,31 +195,25 @@ bool Code::IsYoungSequence(Isolate* isolate, byte* sequence) {
   return result;
 }
 
-
-void Code::GetCodeAgeAndParity(Isolate* isolate, byte* sequence, Age* age,
-                               MarkingParity* parity) {
-  if (IsYoungSequence(isolate, sequence)) {
-    *age = kNoAgeCodeAge;
-    *parity = NO_MARKING_PARITY;
-  } else {
-    Code* code = NULL;
-    Address target_address =
-        Assembler::target_address_at(sequence + kCodeAgingTargetDelta, code);
-    Code* stub = GetCodeFromTargetAddress(target_address);
-    GetCodeAgeAndParity(stub, age, parity);
-  }
+Code::Age Code::GetCodeAge(Isolate* isolate, byte* sequence) {
+  if (IsYoungSequence(isolate, sequence)) return kNoAgeCodeAge;
+
+  Code* code = NULL;
+  Address target_address =
+      Assembler::target_address_at(sequence + kCodeAgingTargetDelta, code);
+  Code* stub = GetCodeFromTargetAddress(target_address);
+  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 / Assembler::kInstrSize);
     Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm());