Use Type in CheckPrototypes.

src/stub-cache.cc

 // 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 1150 matching lines @@
       function_index = Context::BOOLEAN_FUNCTION_INDEX;
     }
 
     GenerateDirectLoadGlobalFunctionPrototype(
         masm(), function_index, scratch1(), miss);
     receiver = handle(JSObject::cast(object->GetPrototype(isolate())));
     object_reg = scratch1();
   }
 
   // Check that the maps starting from the prototype haven't changed.
-  return CheckPrototypes(receiver, object_reg, holder,
-                         scratch1(), scratch2(), scratch3(),
-                         name, miss, check_type);
+  return CheckPrototypes(
+      IC::CurrentTypeOf(receiver, isolate()), object_reg, holder,
+      scratch1(), scratch2(), scratch3(), name, miss, check_type);
 }
 
 
 // HandlerFrontend for store uses the name register. It has to be restored
 // before a miss.
 Register StoreStubCompiler::HandlerFrontendHeader(
     Handle<Object> object,
     Register object_reg,
     Handle<JSObject> holder,
     Handle<Name> name,
     Label* miss) {
-  return CheckPrototypes(Handle<JSObject>::cast(object), object_reg, holder,
-                         this->name(), scratch1(), scratch2(),
-                         name, miss, SKIP_RECEIVER);
+  return CheckPrototypes(
+      IC::CurrentTypeOf(object, isolate()), object_reg, holder, this->name(),
+      scratch1(), scratch2(), name, miss, SKIP_RECEIVER);
 }
 
 
 bool BaseLoadStoreStubCompiler::IncludesNumberType(TypeHandleList* types) {
   for (int i = 0; i < types->length(); ++i) {
     if (types->at(i)->Is(Type::Number())) return true;
   }
   return false;
 }
 
@@ skipping 630 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal