[Global] Update refs to SDK.targetManager

Bug: 1006759
Change-Id: I0686ef929b89e75c2ea8a731c593d955eca85935
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2015119
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
Commit-Queue: Paul Lewis <aerotwist@chromium.org>
diff --git a/front_end/audits/AuditsController.js b/front_end/audits/AuditsController.js
index fd1f5fe..38c4adc 100644
--- a/front_end/audits/AuditsController.js
+++ b/front_end/audits/AuditsController.js
@@ -17,8 +17,8 @@
       preset.setting.addChangeListener(this.recomputePageAuditability.bind(this));
     }
 
-    SDK.targetManager.observeModels(SDK.ServiceWorkerManager, this);
-    SDK.targetManager.addEventListener(
+    self.SDK.targetManager.observeModels(SDK.ServiceWorkerManager, this);
+    self.SDK.targetManager.addEventListener(
         SDK.TargetManager.Events.InspectedURLChanged, this.recomputePageAuditability, this);
   }