Simplify GetProperty helpers to ease element support

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 9aec541d7e04b901cb0822e0dc872ed5d0012170..758f2f194508f176c4bb41dd3e4c15748dc127eb 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1181,10 +1181,7 @@ class Object {
       Handle<Name> key);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithAccessor(
-      Handle<Object> receiver,
-      Handle<Name> name,
-      Handle<JSObject> holder,
-      Handle<Object> structure);
+      LookupIterator* it);
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithAccessor(
       Handle<Object> receiver, Handle<Name> name, Handle<Object> value,
       Handle<JSObject> holder, Handle<Object> structure,
@@ -1890,9 +1887,7 @@ class JSObject: public JSReceiver {
       Handle<AccessorInfo> info);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithInterceptor(
-      Handle<JSObject> object,
-      Handle<Object> receiver,
-      Handle<Name> name);
+      LookupIterator* it);
 
   // Accessors for hidden properties object.
   //