Do not include native Javascript in ExecutionState frames.

test/mjsunit/es6/debug-promises-new-event.js

Index: test/mjsunit/es6/debug-promises-new-event.js
diff --git a/test/mjsunit/es6/debug-promises-new-event.js b/test/mjsunit/es6/debug-promises-new-event.js
index b08077c5b884d7939ac8044b65b3b72c1d388b13..49346ada33fbb84404e7ca8b4d0e4e40bbf7cc59 100644
--- a/test/mjsunit/es6/debug-promises-new-event.js
+++ b/test/mjsunit/es6/debug-promises-new-event.js
@@ -21,6 +21,8 @@ function listener(event, exec_state, event_data, data) {
     assertTrue(event_data.promise().isPromise());
     new_promise = event_data.promise().value();
     assertEquals("pending", event_data.promise().status());
+    assertEquals(1, exec_state.frameCount());
+    assertTrue(exec_state.frame(0).sourceLineText().indexOf("Event") > 0);
   } catch (e) {
     print(e + e.stack)
     exception = e;
@@ -33,7 +35,7 @@ function resolver(resolve, reject) {
   resolve();  // Token
 }
 
-var p = new Promise(resolver);
+var p = new Promise(resolver);  // Event
 assertEquals(new_promise, p);
 
 assertNull(exception);