ServiceWorker: Add ServiceWorkerDispatcherTest

content/child/service_worker/service_worker_dispatcher.h

Index: content/child/service_worker/service_worker_dispatcher.h
diff --git a/content/child/service_worker/service_worker_dispatcher.h b/content/child/service_worker/service_worker_dispatcher.h
index 50a9ca27f5d17577d0c15d9150582adf307848d4..28b9f4f98677b0094ab07abfcd9bcd53f32c5629 100644
--- a/content/child/service_worker/service_worker_dispatcher.h
+++ b/content/child/service_worker/service_worker_dispatcher.h
@@ -41,7 +41,8 @@ struct TransferredMessagePort;
 // This class manages communication with the browser process about
 // registration of the service worker, exposed to renderer and worker
 // scripts through methods like navigator.registerServiceWorker().
-class ServiceWorkerDispatcher : public WorkerTaskRunner::Observer {
+class CONTENT_EXPORT ServiceWorkerDispatcher
+    : public WorkerTaskRunner::Observer {
  public:
   typedef blink::WebServiceWorkerProvider::WebServiceWorkerRegistrationCallbacks
       WebServiceWorkerRegistrationCallbacks;
@@ -147,6 +148,7 @@ class ServiceWorkerDispatcher : public WorkerTaskRunner::Observer {
   typedef std::map<int, WebServiceWorkerRegistrationImpl*>
       RegistrationObjectMap;
 
+  friend class ServiceWorkerDispatcherTest;
   friend class WebServiceWorkerImpl;
   friend class WebServiceWorkerRegistrationImpl;