Remove Object::IsSpecObject, use Object::IsJSReceiver instead.

src/builtins.cc

 // Copyright 2012 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.
 
 #include "src/builtins.h"
 
 #include "src/api.h"
 #include "src/api-natives.h"
 #include "src/arguments.h"
 #include "src/base/once.h"
@@ skipping 1171 matching lines @@
   Handle<Symbol> key(isolate->factory()->is_concat_spreadable_symbol());
   Maybe<bool> maybe =
       JSReceiver::HasProperty(Handle<JSReceiver>::cast(obj), key);
   if (!maybe.IsJust()) return false;
   return maybe.FromJust();
 }
 
 
 bool IsConcatSpreadable(Isolate* isolate, Handle<Object> obj) {
   HandleScope handle_scope(isolate);
-  if (!obj->IsSpecObject()) return false;
+  if (!obj->IsJSReceiver()) return false;
   if (FLAG_harmony_concat_spreadable) {
     Handle<Symbol> key(isolate->factory()->is_concat_spreadable_symbol());
     Handle<Object> value;
     MaybeHandle<Object> maybeValue =
         i::Runtime::GetObjectProperty(isolate, obj, key);
     if (maybeValue.ToHandle(&value) && !value->IsUndefined()) {
       return value->BooleanValue();
     }
   }
   return obj->IsJSArray();
@@ skipping 1198 matching lines @@
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 }  // namespace internal
 }  // namespace v8