Tidy up CompositorWorkerManager unit tests.

Source/modules/serviceworkers/ServiceWorkerContainerClient.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "ServiceWorkerContainerClient.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 26 matching lines @@
 
         ServiceWorkerContainerClient* client = static_cast<ServiceWorkerContainerClient*>(WillBeHeapSupplement<Document>::from(document, supplementName()));
         if (client)
             return client;
 
         // If it's not provided yet, create it lazily.
         document->WillBeHeapSupplementable<Document>::provideSupplement(ServiceWorkerContainerClient::supplementName(), ServiceWorkerContainerClient::create(document->frame()->loader().client()->createServiceWorkerProvider()));
         return static_cast<ServiceWorkerContainerClient*>(WillBeHeapSupplement<Document>::from(document, supplementName()));
     }
 
-    if (context->isServiceWorkerGlobalScope()) {
-        ServiceWorkerContainerClient* client = static_cast<ServiceWorkerContainerClient*>(WillBeHeapSupplement<WorkerClients>::from(toWorkerGlobalScope(context)->clients(), supplementName()));
-        ASSERT(client);
-        return client;
-    }
-
-    ASSERT(context->isWorkerGlobalScope());
-    return static_cast<ServiceWorkerContainerClient*>(WillBeHeapSupplement<WorkerClients>::from(toWorkerGlobalScope(context)->clients(), supplementName()));
+    WorkerClients* clients = toWorkerGlobalScope(context)->clients();
+    ASSERT(clients);
+    return static_cast<ServiceWorkerContainerClient*>(WillBeHeapSupplement<WorkerClients>::from(clients, supplementName()));
 }
 
 ServiceWorkerContainerClient::ServiceWorkerContainerClient(PassOwnPtr<WebServiceWorkerProvider> provider)
     : m_provider(provider)
 {
 }
 
 void provideServiceWorkerContainerClientToWorker(WorkerClients* clients, PassOwnPtr<WebServiceWorkerProvider> provider)
 {
     clients->provideSupplement(ServiceWorkerContainerClient::supplementName(), ServiceWorkerContainerClient::create(provider));
 }
 
 } // namespace blink