Revert of [KeyedLoadIC] Support Smi "handlers" for element loads

src/ic/handler-compiler.h

Index: src/ic/handler-compiler.h
diff --git a/src/ic/handler-compiler.h b/src/ic/handler-compiler.h
index 525889b80b81735b31a3d346ffcc1edfc4744607..242e497b777dac0a7390ca893ff26e83d0a02976 100644
--- a/src/ic/handler-compiler.h
+++ b/src/ic/handler-compiler.h
@@ -279,8 +279,8 @@
 
   virtual ~ElementHandlerCompiler() {}
 
-  static Handle<Object> GetKeyedLoadHandler(Handle<Map> receiver_map,
-                                            Isolate* isolate);
+  static Handle<Code> GetKeyedLoadHandler(Handle<Map> receiver_map,
+                                          Isolate* isolate);
   void CompileElementHandlers(MapHandleList* receiver_maps,
                               List<Handle<Object>>* handlers);