Set object tags directly to the entry name in heap profiler.

src/profile-generator.h

Index: src/profile-generator.h
diff --git a/src/profile-generator.h b/src/profile-generator.h
index bc1fb42d8845c31453f5e74f7a23166ca871e933..92896c29e997a8e1dd22c06b2cbaf505a5df608e 100644
--- a/src/profile-generator.h
+++ b/src/profile-generator.h
@@ -526,6 +526,7 @@ class HeapEntry BASE_EMBEDDED {
   HeapSnapshot* snapshot() { return snapshot_; }
   Type type() { return static_cast<Type>(type_); }
   const char* name() { return name_; }
+  void set_name(const char* name) { name_ = name; }
   inline SnapshotObjectId id() { return id_; }
   int self_size() { return self_size_; }
   int retained_size() { return retained_size_; }