Introduce Object::DebugGetProperty.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 634fbcd6ae00655d8e1b087166e082e51e6ac8ac..820ffaefd3d864353ffeaddfffeff7ab8facc90f 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1552,6 +1552,13 @@ class Object : public MaybeObject {
       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,
@@ -2773,6 +2780,13 @@ class JSObject: public JSReceiver {
   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,