Implement API functions for handling the AccessorDescriptor

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index d8cc742576e2a7550a27c5d4bace45e14bc60528..e232f91034f1501fc2c0933401e97879177f9438 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -536,6 +536,26 @@ Handle<Object> SetAccessor(Handle<JSObject> obj, Handle<AccessorInfo> info) {
 }
 
 
+Handle<Object> SetAccessor(Handle<JSObject> obj,
+                           Handle<String> key,
+                           bool is_getter,
+                           Handle<Object> fun,
+                           PropertyAttributes attributes) {
+  CALL_HEAP_FUNCTION(obj->GetIsolate(),
+                     obj->DefineAccessor(*key, is_getter, *fun, attributes),
+                     Object);
+}
+
+
+Handle<Object> GetAccessor(Handle<JSObject> obj,
+                           Handle<String> key,
+                           bool is_getter) {
+  CALL_HEAP_FUNCTION(obj->GetIsolate(),
+                     obj->LookupAccessor(*key, is_getter),
+                     Object);
+}
+
+
 // Wrappers for scripts are kept alive and cached in weak global
 // handles referred from foreign objects held by the scripts as long as
 // they are used. When they are not used anymore, the garbage