[inspector] async stacks for Promise.then calls...

test/inspector/debugger/async-stack-await-expected.txt

+Checks that async stacks works for async/await
+foo2 (test.js:15:2)
+-- async function --
+foo2 (test.js:13:19)
+test (test.js:24:8)
+(anonymous) (expr.js:0:0)
+
+foo2 (test.js:17:2)
+-- async function --
+foo2 (test.js:13:19)
+test (test.js:24:8)
+(anonymous) (expr.js:0:0)
+
+foo1 (test.js:9:2)
+foo2 (test.js:18:8)

[dgozman, 2017/01/09 22:59:30]

So, we don't get "async function" for await calls anymore? Only if there was an
async/await in this function already? Is that how it is now, or do you change
the behavior in this patch?

[kozy, 2017/01/10 00:11:38]

My goal was to save current behavior for async functions and you can compare
results with last changes and without any changes [1] - there is only one small
change related to better support of promise with late chained callback.

[1]
https://codereview.chromium.org/2578923002/diff2/20001:250001/test/inspector/...

+-- async function --
+foo2 (test.js:13:19)
+test (test.js:24:8)
+(anonymous) (expr.js:0:0)
+
+foo1 (test.js:9:2)
+-- Promise.resolve --
+foo2 (test.js:19:30)
+-- async function --
+foo2 (test.js:13:19)
+test (test.js:24:8)
+(anonymous) (expr.js:0:0)
+
+foo2 (test.js:20:2)
+-- async function --
+foo2 (test.js:13:19)
+test (test.js:24:8)
+(anonymous) (expr.js:0:0)
+
+{
+    id : <messageId>
+    result : {
+        result : {
+            type : undefined
+        }
+    }
+}