Revert of Replace SetObjectProperty / DefineObjectProperty with less powerful alternatives where relevant.

src/objects-inl.h

 // 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 1179 matching lines @@
 
 
 MaybeHandle<Object> Object::GetProperty(Isolate* isolate,
                                         Handle<Object> object,
                                         const char* name) {
   Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
   return GetProperty(object, str);
 }
 
 
-MaybeHandle<Object> JSObject::DefinePropertyOrElement(
-    Handle<JSObject> object, Handle<Name> name, Handle<Object> value,
-    PropertyAttributes attributes) {
-  uint32_t index;
-  if (name->AsArrayIndex(&index)) {
-    return SetOwnElementIgnoreAttributes(object, index, value, attributes);
-  }
-
-  // TODO(verwaest): Is this necessary?
-  if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));
-  return SetOwnPropertyIgnoreAttributes(object, name, value, attributes);
-}
-
-
 #define FIELD_ADDR(p, offset) \
   (reinterpret_cast<byte*>(p) + offset - kHeapObjectTag)
 
 #define FIELD_ADDR_CONST(p, offset) \
   (reinterpret_cast<const byte*>(p) + offset - kHeapObjectTag)
 
 #define READ_FIELD(p, offset) \
   (*reinterpret_cast<Object* const*>(FIELD_ADDR_CONST(p, offset)))
 
 #define ACQUIRE_READ_FIELD(p, offset)           \
@@ skipping 6137 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_