Control use of JavaScript JIT

Allows you to set whether Google Chrome will run the v8 JavaScript engine with JIT (Just In Time) compiler enabled or not. Disabling the JavaScript JIT will mean that Google Chrome may render web content more slowly, and may also disable parts of JavaScript including WebAssembly. Disabling the JavaScript JIT may allow Google Chrome to render web content in a more secure configuration. This policy can be overridden for specific URL patterns using the JavaScriptJitAllowedForSites and JavaScriptJitBlockedForSites policies. If this policy is left not set, JavaScript JIT is enabled.