Bug 1412081 - Call KillClearOnShutdown(ShutdownPhase::ShutdownFinal) in PluginProcessChild on all platforms r=jimm

This call gated by ifdef OS_WIN - so on Linux it would leak objects that were supposed to be ClearOnShutdown in the plugin process

--HG--
extra : rebase_source : 24c4233ec8735e0176d584b623ad626d0a9b5c3b

dom/plugins/ipc/PluginProcessChild.cpp

@@ -167,9 +167,10 @@ PluginProcessChild::CleanUp()
     // call XPCOM's shutdown but we need this event to be sent to avoid
     // leaking objects labeled as ClearOnShutdown.
     nsThreadManager::get().Shutdown();
-    mozilla::KillClearOnShutdown(ShutdownPhase::ShutdownFinal);
     NS_LogTerm();
 #endif
+
+    mozilla::KillClearOnShutdown(ShutdownPhase::ShutdownFinal);
 }
 
 } // namespace plugins