Do not include native Javascript in ExecutionState frames.

test/mjsunit/es6/debug-promise-events.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --allow-natives-syntax --expose-debug-as debug
 
 Debug = debug.Debug;
 
 var eventsExpected = 16;
 var exception = null;
@@ skipping 14 matching lines @@
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.PromiseEvent) return;
   try {
     eventsExpected--;
     assertTrue(event_data.promise().isPromise());
     if (event_data.status() === 0) {
       // New promise.
       assertEquals("pending", event_data.promise().status());
       result.push({ promise: event_data.promise().value(), status: 0 });
+      assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
     } else if (event_data.status() !== undefined) {
       // Resolve/reject promise.
       updatePromise(event_data.promise().value(),
                     undefined,
                     event_data.status(),
                     event_data.value().value());
     } else {
       // Chain promises.
       assertTrue(event_data.parentPromise().isPromise());
       updatePromise(event_data.promise().value(),
                     event_data.parentPromise().value());
+      assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
     }
   } catch (e) {
     print(e + e.stack)
     exception = e;
   }
 }
 
 Debug.setListener(listener);
 
-function resolver(resolve, reject) {
-  resolve();
-}
+function resolver(resolve, reject) { resolve(); }
 
-var p1 = new Promise(resolver);
-var p2 = p1.then().then();
-var p3 = new Promise(function(resolve, reject) { reject("rejected"); });
-var p4 = p3.then();
-var p5 = p1.then();
+var p1 = new Promise(resolver);  // event
+var p2 = p1.then().then();  // event
+var p3 = new Promise(function(resolve, reject) {  // event
+  reject("rejected");
+});
+var p4 = p3.then();  // event
+var p5 = p1.then();  // event
 
 function assertAsync(b, s) {
   if (b) {
     print(s, "succeeded");
   } else {
     %AbortJS(s + " FAILED!");
   }
 }
 
 function testDone(iteration) {
@@ skipping 39 matching lines @@
     }
   }
 
   var iteration = iteration || 0;
   var dummy = {};
   Object.observe(dummy, checkResult);
   dummy.dummy = dummy;
 }
 
 testDone();