Test the truthiness of window.ReportingObserver rather than compare against null; the latter will always be false.
Test the truthiness of window.ReportingObserver rather than compare against null; the latter will always be false.

RELNOTES: n/a
PiperOrigin-RevId: 370109164
Change-Id: Iff22e6a5f527d0bf1eb53d1d5b2a6371bedff0d5

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library