Bug 1506513: Use clientWrapper instead of client. r=jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D13970

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

devtools/client/aboutdebugging-new/src/actions/debug-targets.js

@@ -66,7 +66,8 @@ function inspectDebugTarget(type, id) {
       }
       case DEBUG_TARGETS.WORKER: {
         // Open worker toolbox in new window.
-        const front = runtimeDetails.client.client.getActor(id);
+        const devtoolsClient = runtimeDetails.clientWrapper.client;
+        const front = devtoolsClient.getActor(id);
         gDevToolsBrowser.openWorkerToolbox(front);
         break;
       }