Add basic browser test for EmbeddedWorker/ServiceWorker

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index e911e4c3473d33a60dc7917ce490c49d804e087a..4ab4351be7d9088b592469aafc23bbf61a97e16b 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -81,6 +81,8 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   }
 
  private:
+  friend class ServiceWorkerBrowserTest;
+
   typedef IDMap<ServiceWorkerProviderHost, IDMapOwnPointer> ProviderMap;
   typedef IDMap<ProviderMap, IDMapOwnPointer> ProcessToProviderMap;
 
@@ -93,6 +95,9 @@ class CONTENT_EXPORT ServiceWorkerContextCore
       ServiceWorkerRegistrationStatus status,
       const scoped_refptr<ServiceWorkerRegistration>& registration);
 
+  // Used only for testing.
+  void GetAllProviderHosts(std::vector<ServiceWorkerProviderHost*>* providers);
+
   ProcessToProviderMap providers_;
   scoped_ptr<ServiceWorkerStorage> storage_;
   scoped_ptr<ServiceWorkerJobCoordinator> job_coordinator_;