Bug 1599226 - Suppress Hazard Analysis through nsJSPrincipals::isSystemOrAddonPrincipal r=jandem

Differential Revision: https://phabricator.services.mozilla.com/D62771

--HG--
extra : moz-landing-system : lando

caps/nsJSPrincipals.cpp

@@ -386,6 +386,7 @@ bool nsJSPrincipals::write(JSContext* aCx, JSStructuredCloneWriter* aWriter) {
 }
 
 bool nsJSPrincipals::isSystemOrAddonPrincipal() {
+  JS::AutoSuppressGCAnalysis suppress;
   return this->IsSystemPrincipal() ||
          this->GetIsAddonOrExpandedAddonPrincipal();
 }