Introduce Object::DebugGetProperty.

src/objects.h

 // 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 1534 matching lines @@
   MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
       Handle<Object> object,
       Handle<Name> key);
   MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
       Handle<Object> object,
       Handle<Object> receiver,
       LookupResult* result,
       Handle<Name> key,
       PropertyAttributes* attributes);
 
+  // Get property bypassing access checks.
+  MUST_USE_RESULT static Handle<Object> DebugGetProperty(
+      Handle<Object> receiver,
+      Handle<Name> name,
+      LookupResult* result,
+      bool* has_caught = NULL);
+
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithDefinedGetter(
       Handle<Object> object,
       Handle<Object> receiver,
       Handle<JSReceiver> getter);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
       Isolate* isolate,
       Handle<Object> object,
       uint32_t index);
 
@@ skipping 1201 matching lines @@
                                   Handle<Object> old_value);
 
  private:
   friend class DictionaryElementsAccessor;
   friend class JSReceiver;
   friend class Object;
 
   static void UpdateAllocationSite(Handle<JSObject> object,
                                    ElementsKind to_kind);
 
+  MUST_USE_RESULT static inline MaybeHandle<Object> GetPropertyAfterAccessCheck(
+      Isolate* isolate,
+      Handle<Object> receiver,
+      Handle<Name> name,
+      LookupResult* result,
+      PropertyAttributes* attributes);
+
   // Used from Object::GetProperty().
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithFailedAccessCheck(
       Handle<JSObject> object,
       Handle<Object> receiver,
       LookupResult* result,
       Handle<Name> name,
       PropertyAttributes* attributes);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetElementWithCallback(
       Handle<JSObject> object,
@@ skipping 8237 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_