use of diagnostics script engine to execute script in IE driver refactor

gistfile1.txt

  std::wstring script = L"";
  //script.append(L"browser.result = browser.executeScript(\"");
  //script.append(L"(function() { ");
  //script.append(script_source);
  //script.append(L" }).apply(window, [])");
  //script.append(L"\");");
  //script.append(L"\nexternal.sendMessage('debug', JSON.stringify(browser.webdriver.known));");
  //script.append(L"\nexternal.sendMessage('script', JSON.stringify(browser.result));");
  //script.append(L"browser.scriptContext = dom.getCrossSiteWindow(browser.document.parentWindow, browser.document.parentWindow);");
  script.append(L"browser.context = browser.executeScript(\"window;\"");
  script.append(L"\nexternal.sendMessage('script', JSON.stringify(browser.context.frames.length));");
  HRESULT hr = this->script_engine_->EvaluateScript(script.c_str(), L"");
  if (FAILED(hr)) {
    _com_error error(hr);
    std::wstring formatted_message =
      StringUtilities::Format(L"Received error: 0x%08x ['%s']",
                              hr,
                              error.ErrorMessage());
    this->response_ = StringUtilities::ToString(formatted_message);
  } else {
    script = L"";
    script.append(L"browser.result = browser.scriptFn.apply(window);");
    //script.append(L"\nexternal.sendMessage('script', JSON.stringify(browser.result));");
    hr = this->script_engine_->EvaluateScript(script.c_str(), L"");
    this->response_ = "success";
  }
  return;