Earlier quoted context omitted.
Isn't UIWebView a component written by Apple? Why not include Nitro in it? Why would it be a security issue on Chrome but not on Safari? Do people have access to the UIWebView source code? If not, this "security" reason is BS.
Third-party processes on iOS cannot mark data pages as executable, which is a great security feature but it prevents JIT compilers or any other technology that dynamically generates machine code. Apple's built-in apps have an exception to this security mechanism, presumably because Apple is more confident in their own security auditing of those apps. Perhaps with some sandboxing mechanism and/or code auditing process…
Doesn't the UIWebView do that for you? And isn't it written by Apple? Why couldn't Apple make it use Nitro? Not sure where the security risk would be.