[heap] Added fine grained timers to MC_MARK_WEAK_CLOSURE.

src/heap/gc-tracer.h

Index: src/heap/gc-tracer.h
diff --git a/src/heap/gc-tracer.h b/src/heap/gc-tracer.h
index 73af01b07fe10113538f170c330a2f81d3f579c8..70515f9285a077984655d4cafb7b19562f71b4f1 100644
--- a/src/heap/gc-tracer.h
+++ b/src/heap/gc-tracer.h
@@ -129,6 +129,10 @@ class GCTracer {
       MC_MARK_PREPARE_CODE_FLUSH,
       MC_MARK_ROOTS,
       MC_MARK_WEAK_CLOSURE,
+      MC_MARK_WEAK_CLOSURE_EPHEMERAL,
+      MC_MARK_WEAK_CLOSURE_WEAK_HANDLES,
+      MC_MARK_WEAK_CLOSURE_WEAK_ROOTS,
+      MC_MARK_WEAK_CLOSURE_HARMONY,
       MC_SWEEP,
       MC_SWEEP_CODE,
       MC_SWEEP_MAP,