[ic] Support non-code handlers in megamorphic stub cache.

src/ic/stub-cache.h

Index: src/ic/stub-cache.h
diff --git a/src/ic/stub-cache.h b/src/ic/stub-cache.h
index ebcff448add27aa5b83b3f9078f3cf45726b8e4b..bdd7f4a3bef08ca1521083d6141a772a3bbd5b28 100644
--- a/src/ic/stub-cache.h
+++ b/src/ic/stub-cache.h
@@ -35,14 +35,14 @@ class StubCache {
  public:
   struct Entry {
     Name* key;
-    Code* value;
+    Object* value;
     Map* map;
   };
 
   void Initialize();
   // Access cache for entry hash(name, map).
-  Code* Set(Name* name, Map* map, Code* code);
-  Code* Get(Name* name, Map* map);
+  Object* Set(Name* name, Map* map, Object* handler);
+  Object* Get(Name* name, Map* map);
   // Clear the lookup table (@ mark compact collection).
   void Clear();
   // Collect all maps that match the name.