Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/service_worker_network_provider.h

Index: content/child/service_worker/service_worker_network_provider.h
diff --git a/content/child/service_worker/service_worker_network_provider.h b/content/child/service_worker/service_worker_network_provider.h
index 400918f969d96ea9c7050eb9f03ee94a8e215527..0d6f494421ece7d2185fa028fa3da0cd117b348c 100644
--- a/content/child/service_worker/service_worker_network_provider.h
+++ b/content/child/service_worker/service_worker_network_provider.h
@@ -6,12 +6,15 @@
 #define CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_NETWORK_PROVIDER_IMPL_H_
 
 #include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/supports_user_data.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
+class ServiceWorkerProviderContext;
+
 // A unique provider_id is generated for each instance.
 // Instantiated prior to the main resource load being started and remains
 // allocated until after the last subresource load has occurred.
@@ -37,6 +40,7 @@ class CONTENT_EXPORT ServiceWorkerNetworkProvider
   virtual ~ServiceWorkerNetworkProvider();
 
   int provider_id() const { return provider_id_; }
+  ServiceWorkerProviderContext* context() { return context_.get(); }
 
   // This method is called for a provider that's associated with a
   // running service worker script. The version_id indicates which
@@ -45,6 +49,7 @@ class CONTENT_EXPORT ServiceWorkerNetworkProvider
 
  private:
   const int provider_id_;
+  scoped_refptr<ServiceWorkerProviderContext> context_;
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerNetworkProvider);
 };