Remove temporary hack re deleting hidden properties

src/objects.cc

 // Copyright 2013 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 <iomanip>
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 5213 matching lines @@
             MessageTemplate::Template templ =
                 receiver->map()->is_strong()
                     ? MessageTemplate::kStrongDeleteProperty
                     : MessageTemplate::kStrictDeleteProperty;
             THROW_NEW_ERROR(
                 isolate, NewTypeError(templ, it->GetName(), receiver), Object);
           }
           return it->factory()->false_value();
         }
 
-        Handle<JSObject> holder = it->GetHolder<JSObject>();
-        // TODO(verwaest): Remove this temporary compatibility hack when blink
-        // tests are updated.
-        if (!holder.is_identical_to(receiver) &&
-            !(receiver->IsJSGlobalProxy() && holder->IsJSGlobalObject())) {
-          return it->factory()->true_value();
-        }
-
         it->Delete();
 
         if (is_observed) {
           RETURN_ON_EXCEPTION(isolate,
                               JSObject::EnqueueChangeRecord(
                                   receiver, "delete", it->GetName(), old_value),
                               Object);
         }
 
         return it->factory()->true_value();
@@ skipping 10868 matching lines @@
                                             Handle<Object> new_value) {
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 }  // namespace internal
 }  // namespace v8