Tests that Page.setBypassCSP works for main frame.
Verify CSP works when set with <meta>
  CSP bypassed: false
Verify CSP works when set with header
  CSP bypassed: false

>> ENABLING CSP BYPASS <<

Verify CSP is bypassed when set with <meta>
  CSP bypassed: true
Verify CSP is bypassed when set with header
  CSP bypassed: true
Check bypass after cross-origin navigation
  CSP bypassed: true