[inspector] added creation frame for async call chains for promises

test/inspector/debugger/async-stack-await.js

 // Copyright 2016 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.
 
 print('Checks that async stacks works for async/await');
 
 InspectorTest.addScript(`
 async function foo1() {
   debugger;
   return Promise.resolve();
@@ skipping 14 matching lines @@
 }
 //# sourceURL=test.js`, 7, 26);
 
 InspectorTest.setupScriptMap();
 Protocol.Debugger.onPaused(message => {
   InspectorTest.logCallFrames(message.params.callFrames);
   var asyncStackTrace = message.params.asyncStackTrace;
   while (asyncStackTrace) {
     InspectorTest.log(`-- ${asyncStackTrace.description} --`);
     InspectorTest.logCallFrames(asyncStackTrace.callFrames);
+    if (asyncStackTrace.creationFrame) {
+      InspectorTest.log('--- created in ---');
+      InspectorTest.logCallFrames([asyncStackTrace.creationFrame]);

[dgozman, 2017/01/24 01:02:41]

Let's dump it on the same line as description.

[kozy, 2017/01/24 21:43:39]

Done.

+    }
     asyncStackTrace = asyncStackTrace.parent;
   }
   InspectorTest.log('');
   Protocol.Debugger.resume();
 });
 
 Protocol.Debugger.enable();
 Protocol.Debugger.setAsyncCallStackDepth({ maxDepth: 128 });
 Protocol.Runtime.evaluate({ expression: 'test()//# sourceURL=expr.js',
     awaitPromise: true })
   .then(InspectorTest.logMessage)
   .then(InspectorTest.completeTest);