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

test/inspector/debugger/async-stack-for-promise.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 chains for promises are correct.');
 
 InspectorTest.addScript(`
 function foo1() {
   debugger;
 }
@@ skipping 206 matching lines @@
   return Promise.reject().catch(foo1);
 }
 
 //# 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} --`);
+    if (asyncStackTrace.promiseCreationFrame) {
+      var frame = asyncStackTrace.promiseCreationFrame;
+      InspectorTest.log(`-- ${asyncStackTrace.description} (${frame.url
+                        }:${frame.lineNumber}:${frame.columnNumber})--`);
+    } else {
+      InspectorTest.log(`-- ${asyncStackTrace.description} --`);
+    }
     InspectorTest.logCallFrames(asyncStackTrace.callFrames);
     asyncStackTrace = asyncStackTrace.parent;
   }
   InspectorTest.log('');
   Protocol.Debugger.resume();
 });
 
 Protocol.Debugger.enable();
 Protocol.Debugger.setAsyncCallStackDepth({ maxDepth: 128 });
 var testList = [
@@ skipping 18 matching lines @@
     Protocol.Runtime.evaluate({ expression: \`${name}()
 //# sourceURL=test${capitalize(name)}.js\`, awaitPromise: true})
       .then(next);
   })
   `);
 }));
 
 function capitalize(string) {
   return string.charAt(0).toUpperCase() + string.slice(1);
 }