Add code age subtype tracking to --track-gc-object-stats

src/ia32/codegen-ia32.cc

Index: src/ia32/codegen-ia32.cc
diff --git a/src/ia32/codegen-ia32.cc b/src/ia32/codegen-ia32.cc
index 226b6b0e248a797257a49cdb86f56758319c7f79..d09a85f8b10c37e8a56fcde32760d395a50fb52b 100644
--- a/src/ia32/codegen-ia32.cc
+++ b/src/ia32/codegen-ia32.cc
@@ -1149,7 +1149,7 @@ bool Code::IsYoungSequence(byte* sequence) {
 void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
                                MarkingParity* parity) {
   if (IsYoungSequence(sequence)) {
-    *age = kNoAge;
+    *age = kNoAgeCodeAge;
     *parity = NO_MARKING_PARITY;
   } else {
     sequence++;  // Skip the kCallOpcode byte
@@ -1167,7 +1167,7 @@ void Code::PatchPlatformCodeAge(Isolate* isolate,
                                 MarkingParity parity) {
   uint32_t young_length;
   byte* young_sequence = GetNoCodeAgeSequence(&young_length);
-  if (age == kNoAge) {
+  if (age == kNoAgeCodeAge) {
     CopyBytes(sequence, young_sequence, young_length);
     CPU::FlushICache(sequence, young_length);
   } else {