[runtime] Make sure that LookupIterator::OWN always performs a HIDDEN lookup as well.

src/runtime/runtime-debug.cc

 // 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/debug-scopes.h"
@@ skipping 340 matching lines @@
   if (name->AsArrayIndex(&index)) {
     Handle<FixedArray> details = isolate->factory()->NewFixedArray(2);
     Handle<Object> element_or_char;
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
         isolate, element_or_char, JSReceiver::GetElement(isolate, obj, index));
     details->set(0, *element_or_char);
     details->set(1, PropertyDetails::Empty().AsSmi());
     return *isolate->factory()->NewJSArrayWithElements(details);
   }
 
-  LookupIterator it(obj, name, LookupIterator::HIDDEN);
+  LookupIterator it(obj, name, LookupIterator::OWN);
   bool has_caught = false;
   Handle<Object> value = DebugGetProperty(&it, &has_caught);
   if (!it.IsFound()) return isolate->heap()->undefined_value();
 
   Handle<Object> maybe_pair;
   if (it.state() == LookupIterator::ACCESSOR) {
     maybe_pair = it.GetAccessors();
   }
 
   // If the callback object is a fixed array then it contains JavaScript
@@ skipping 1173 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8