解决 CEF 76+ 内核默认禁用 Flash 插件提示 “右键点击即可运行 Adobe Flash Player”

CefRequestContextSettings rcsettings;
CefString(&rcsettings.cache_path).FromWString(app_data_path);
auto request_content = CefRequestContext::CreateContext(rcsettings, new ClientRequestContextHandler);
CefString error;
CefRefPtr<CefValue> value = CefValue::Create();
value->SetInt(1);
request_content->SetPreference("profile.default_content_setting_values.plugins", value, error);
CefBrowserHost::CreateBrowser(window_info, 
    handler, 
    cached_login_addr ? url : "", 
    browser_settings, 
    nullptr, 
    request_content);