[inspector] added test for StepOut at return postion from async function

Should be fixed.

BUG=v8:6161
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2779143002
Cr-Commit-Position: refs/heads/master@{#44209}

test/inspector/debugger/step-out-async-await-expected.txt

+StepOut from return position of async function.
+
+Running test: testStepInto
+      p.then(() => 1);
+      #debugger;
+      return p;
+
+      debugger;
+      #return p;
+    }
+
+      return p;
+    #}
+    await foo();
+
+      await p;
+      p.then(() => #1);
+      debugger;
+
+
+Running test: testStepOver
+      p.then(() => 1);
+      #debugger;
+      return p;
+
+      debugger;
+      #return p;
+    }
+
+      return p;
+    #}
+    await foo();
+
+      await p;
+      p.then(() => #1);
+      debugger;
+
+      await p;
+      p.then(() => 1#);
+      debugger;
+
+    await foo();
+  #}
+
+
+
+Running test: testStepOut
+      p.then(() => 1);
+      #debugger;
+      return p;
+
+      debugger;
+      #return p;
+    }
+
+      return p;
+    #}
+    await foo();
+
+      await p;
+      p.then(() => #1);
+      debugger;
+
+    await foo();
+  #}
+
+

test/inspector/debugger/step-out-async-await.js

+// Copyright 2017 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.
+
+// TODO(kozyatinskiy): on StepOut and probably StepNext at return position
+// of async generator we should break at next instruction of resumed generator
+// instead of next scheduled microtask.
+
+InspectorTest.log('StepOut from return position of async function.');
+
+InspectorTest.addScript(`
+  async function testFunction() {
+    async function foo() {
+      var p = Promise.resolve();
+      await p;
+      p.then(() => 1);
+      debugger;
+      return p;
+    }
+    await foo();
+  }
+`);
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.enable();
+InspectorTest.runAsyncTestSuite([
+  async function testStepInto() {
+    Protocol.Runtime.evaluate({expression: 'testFunction()'});
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.resume();
+  },
+
+  async function testStepOver() {
+    Protocol.Runtime.evaluate({expression: 'testFunction()'});
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepOver();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepOver();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepOver();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.resume();
+  },
+
+  async function testStepOut() {
+    Protocol.Runtime.evaluate({expression: 'testFunction()'});
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepInto();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepOut();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.stepOut();
+    await logPauseLocation(await Protocol.Debugger.oncePaused());
+    Protocol.Debugger.resume();
+  },
+]);
+
+function logPauseLocation(message) {
+  return InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+}