Ignore intervention header when generating request hash

[kdzwinel]

Steps to reproduce

Tell us about your environment:

• Puppeteer version: 1.11.0 (bug is also present in ToT - f8615c8 )
• Platform / OS version: macOS 10.14.x
• URLs (if applicable):
• Node.js version: 8.9.0

What steps will reproduce the problem?

https://gist.github.com/kdzwinel/d853006b0934c9ae3b5852eb964f292c

• Running bad.js script against test_page.html will fail (timeout) while vanilla CDP version of the same script (good.js) will succeed.
• This happens because redirected request never completes.
• It never completes because of the request hash difference.
• Hash difference is caused by intervention header injected by the browser (because disallow-doc-written-script-loads is enabled).

Hash A:

"{"url":"http://de.ioam.de/tx.io?mg=no&st=toi&cp=%2Ftest%2Froot&oc=%2Froot&sv=in&pt=CP&ps=lin&er=N22&rf=&r2=&ur=example.com%3A8080&xy=1440x900x24&lo=ES%2Fxxx&cb=0012&i2=0012a7493b1041c925c360c56&ep=1569196621&vr=412&id=xi82n4&i3=nocookie&n1=3&dntt=0&lt=1547045974863&ev=&cs=z9zs2b&mo=1&sr=71","method":"GET","headers":{"user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/72.0.3617.0 Safari/537.36"}}"

Hash B:

"{"url":"http://de.ioam.de/tx.io?mg=no&st=toi&cp=%2Ftest%2Froot&oc=%2Froot&sv=in&pt=CP&ps=lin&er=N22&rf=&r2=&ur=example.com%3A8080&xy=1440x900x24&lo=ES%2Fxxx&cb=0012&i2=0012a7493b1041c925c360c56&ep=1569196621&vr=412&id=xi82n4&i3=nocookie&n1=3&dntt=0&lt=1547045974863&ev=&cs=z9zs2b&mo=1&sr=71","method":"GET","headers":{"intervention":"https://www.chromestatus.com/feature/5718547946799104; level="warning"","user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/72.0.3617.0 Safari/537.36"}}"

What is the expected result?
intervention header should be appended to the IGNORED_HEADERS and/or all interventions should be disabled in puppeteer by default.

What happens instead?
intervention header causes some intercepted requests to 'hang'.

[kdzwinel]

Thank you @aslushnikov 🙌