When running the following browser tests:
SSLUITest.TestInterstitialJavaScriptGoesBack
SSLUITest.TestInterstitialJavaScriptProceeds
SSLUITestWithExtendedReporting.TestBadClockReportingWithNoOptIn
SSLUITestWithExtendedReporting.TestBadClockReportingWithOptIn
using "--enable-features=NetworkService" flag, they fail because the obtained |interstitial_page| is nullptr:
InterstitialPage* interstitial_page = tab->GetInterstitialPage();