Use POLYMORPHIC for polymorphic Keyed(Load|Store)IC

src/type-info.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 224 matching lines @@
 
 class TypeFeedbackOracle: public ZoneObject {
  public:
   TypeFeedbackOracle(Handle<Code> code,
                      Handle<Context> native_context,
                      Isolate* isolate,
                      Zone* zone);
 
   bool LoadIsMonomorphicNormal(Property* expr);
   bool LoadIsUninitialized(Property* expr);
-  bool LoadIsMegamorphicWithTypeInfo(Property* expr);
+  bool LoadIsPolymorphic(Property* expr);
   bool StoreIsMonomorphicNormal(TypeFeedbackId ast_id);
-  bool StoreIsMegamorphicWithTypeInfo(TypeFeedbackId ast_id);
+  bool StoreIsPolymorphic(TypeFeedbackId ast_id);
   bool CallIsMonomorphic(Call* expr);
   bool CallNewIsMonomorphic(CallNew* expr);
   bool ObjectLiteralStoreIsMonomorphic(ObjectLiteral::Property* prop);
 
   bool IsForInFastCase(ForInStatement* expr);
 
   Handle<Map> LoadMonomorphicReceiverType(Property* expr);
   Handle<Map> StoreMonomorphicReceiverType(TypeFeedbackId ast_id);
 
   void LoadReceiverTypes(Property* expr,
@@ skipping 69 matching lines @@
   Isolate* isolate_;
   Handle<UnseededNumberDictionary> dictionary_;
   Zone* zone_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_