Revert of [ic] Use validity cells to protect keyed element stores against object's prototype chain…

src/ic/ic-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_IC_COMPILER_H_
 #define V8_IC_IC_COMPILER_H_
 
 #include "src/ic/access-compiler.h"
 
 namespace v8 {
 namespace internal {
 
 
 class PropertyICCompiler : public PropertyAccessCompiler {
  public:
   // Keyed
-  static Handle<Object> ComputeKeyedStoreMonomorphicHandler(
+  static Handle<Code> ComputeKeyedStoreMonomorphicHandler(
       Handle<Map> receiver_map, KeyedAccessStoreMode store_mode);
   static void ComputeKeyedStorePolymorphicHandlers(
       MapHandleList* receiver_maps, MapHandleList* transitioned_maps,
-      List<Handle<Object>>* handlers, KeyedAccessStoreMode store_mode);
+      CodeHandleList* handlers, KeyedAccessStoreMode store_mode);
 
  private:
   explicit PropertyICCompiler(Isolate* isolate)
       : PropertyAccessCompiler(isolate, Code::KEYED_STORE_IC,
                                kCacheOnReceiver) {}
 
-  Handle<Object> CompileKeyedStoreMonomorphicHandler(
+  Handle<Code> CompileKeyedStoreMonomorphicHandler(
       Handle<Map> receiver_map, KeyedAccessStoreMode store_mode);
   void CompileKeyedStorePolymorphicHandlers(MapHandleList* receiver_maps,
                                             MapHandleList* transitioned_maps,
-                                            List<Handle<Object>>* handlers,
+                                            CodeHandleList* handlers,
                                             KeyedAccessStoreMode store_mode);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IC_IC_COMPILER_H_