Tests that Debugger.getGeneratorObjectDetails command returns correct result.


Running: testIterNotStarted
Exception while running: function didEvaluate(remote) {
      TestRunner.addResult(
          pageExpression + ': type = ' + remote.type +
          ', subtype = ' + remote.subtype);
      remote.getOwnPropertiesPromise().then(dumpInternalProperties);
    }
TypeError: Cannot read property 'type' of undefined
    at didEvaluate (http://127.0.0.1:8000/devtools/sources/debugger-ui/function-generator-details.js:53:49)
    at result (file:///b/s/w/ir/out/Release/resources/inspector/integration_test_runner.js:8081:42)
    at Object.TestRunner.evaluateInPage (file:///b/s/w/ir/out/Release/resources/inspector/integration_test_runner.js:8093:1795)

