Enable Flash player on Chrome(headless mode) v64 while running selenium test

[svetloz...@mtr-design.com]

I'm having the following problem: I'm running selenium tests with chrome in headless mode and I tried to screen capture a website with flash content,
but the content is broken. Which chrome options need to be set to enable the flash ?

  My environment:

    Selenium v2.53

    Behat  v3.3

    Chrome v64

  I tried to set followed chrome option in behat.yml, but they didn't work

    chromeOptions:
                binary: PATH_TO_MY_BIN
                args:
                  - "--no-sandbox"
                  - "--disable-gpu"
                  - "--dns-prefetch-disable"
                  - "--disable-setuid-sandbox"
                prefs:
                    profile.default_content_setting_values.plugins: '1'
                    profile.content_settings.plugin_whitelist.adobe-flash-player: '1'
                    profile.content_settings.exceptions.plugins.*,*.per_resource.adobe-flash-player: '1'
                    PluginsAllowedForUrls: "ALLOWED_URLS"
                    DefaultPluginsSetting: '1'

[ajmc...@gmail.com]

I dont think it works: https://bugs.chromium.org/p/chromedriver/issues/detail?id=1872