Bug 1522830: Part 11 - Adjust shutdown phase in widget/windows/WinUtils for telemetry whitelisting; r=mhowell

The current shutdown phase is too early and thus may crash when called
by `UntrustedModulesProcessor`. We move it to a later phase such that the
processor has already shut down.

Differential Revision: https://phabricator.services.mozilla.com/D53683

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

widget/windows/WinUtils.cpp

@@ -2088,7 +2088,8 @@ WinUtils::WhitelistVec WinUtils::BuildWhitelist() {
 const WinUtils::WhitelistVec& WinUtils::GetWhitelistedPaths() {
   static WhitelistVec sWhitelist([]() -> WhitelistVec {
     auto setClearFn = [ptr = &sWhitelist]() -> void {
-      RunOnShutdown([ptr]() -> void { ptr->clear(); }, ShutdownPhase::Shutdown);
+      RunOnShutdown([ptr]() -> void { ptr->clear(); },
+                    ShutdownPhase::ShutdownFinal);
     };
 
     if (NS_IsMainThread()) {