[KeyedLoadIC] Support Smi "handlers" for element loads

src/ic/handler-compiler.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_HANDLER_COMPILER_H_
 #define V8_IC_HANDLER_COMPILER_H_
 
 #include "src/ic/access-compiler.h"
 #include "src/ic/ic-state.h"
 
@@ skipping 261 matching lines @@
 
 class ElementHandlerCompiler : public PropertyHandlerCompiler {
  public:
   explicit ElementHandlerCompiler(Isolate* isolate)
       : PropertyHandlerCompiler(isolate, Code::KEYED_LOAD_IC,
                                 Handle<Map>::null(), Handle<JSObject>::null(),
                                 kCacheOnReceiver) {}
 
   virtual ~ElementHandlerCompiler() {}
 
-  static Handle<Code> GetKeyedLoadHandler(Handle<Map> receiver_map,
-                                          Isolate* isolate);
+  static Handle<Object> GetKeyedLoadHandler(Handle<Map> receiver_map,
+                                            Isolate* isolate);
   void CompileElementHandlers(MapHandleList* receiver_maps,
                               List<Handle<Object>>* handlers);
 
   static void GenerateStoreSlow(MacroAssembler* masm);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IC_HANDLER_COMPILER_H_