[inspector] changed a way of preserving stepping between tasks

test/inspector/debugger/step-over-another-context-group.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.
+
+InspectorTest.log('Checks stepping with more then one context group.');
+
+(async function test() {
+  InspectorTest.setupScriptMap();
+  await Protocol.Debugger.enable();
+  let contextGroupId = utils.createContextGroup();
+  await Protocol.Debugger.enable({}, contextGroupId);
+  Protocol.Runtime.evaluate({expression: 'debugger'});
+  Protocol.Runtime.evaluate({expression: 'setTimeout(() => { debugger }, 0)'}, contextGroupId);
+  Protocol.Runtime.evaluate({expression: 'setTimeout(() => 42, 0)'});
+  await waitPauseAndDumpLocation();
+  Protocol.Debugger.stepOver();
+  await Protocol.Debugger.oncePaused();
+  Protocol.Debugger.stepOver();
+  await waitPauseAndDumpLocation();
+  await Protocol.Debugger.disable({}, contextGroupId);
+  await Protocol.Debugger.disable();
+  InspectorTest.completeTest();
+})();
+
+async function waitPauseAndDumpLocation() {
+  var message = await Protocol.Debugger.oncePaused();
+  InspectorTest.log('paused at:');
+  await InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+  return message;
+}