How to disable all Chrome security policies temporarily without killing and restarting Chrome?

I want to use js code in parent window to change the content of a cross-orign iframe. Such as:

document.getElementById('someiframe').contentWindow.XXX=true

Of course it should be blocked by browser.

Open Chrome with parameter "--disable-web-security" can solve the problem. I have used a chrome plugin called "cros-anywhere" which can fast switch whether CROS is enabled. I wonder if there are any plugins or other ways can fast switch all security policies on/off without restarting the browser.

I want to build some web pages that can access as many permissions as they can so that the scripts can work like a C/S application. Then I and those who know the risk of running such scripts can conveniently enter "unsafe mode" with one click to run that scripts. Is there any way to realize it?