[turbofan] Remove remaining uses of Class type from the compiler.

src/types.h

Index: src/types.h
diff --git a/src/types.h b/src/types.h
index 746cca764ea08e38cce14cd5614ab5cb72a48c30..63dc1d65789eccc130eafaa58df328a11307805c 100644
--- a/src/types.h
+++ b/src/types.h
@@ -764,6 +764,11 @@ class Type {
     return Of(*value, zone);
   }
 
+  static Type* For(i::Map* map) {
+    return BitsetType::New(BitsetType::ExpandInternals(BitsetType::Lub(map)));
+  }
+  static Type* For(i::Handle<i::Map> map) { return For(*map); }
+
   // Extraction of components.
   static Type* Representation(Type* t, Zone* zone);
   static Type* Semantic(Type* t, Zone* zone);