Adds a basic offline check to InstallableManager.

content/browser/service_worker/service_worker_context_wrapper.h

Index: content/browser/service_worker/service_worker_context_wrapper.h
diff --git a/content/browser/service_worker/service_worker_context_wrapper.h b/content/browser/service_worker/service_worker_context_wrapper.h
index 04001b9c0f19dd24b2748eabf23fe61d4aedce06..c0ddcb2afa641047b6f0eec15867b24bb80bdcda 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.h
+++ b/content/browser/service_worker/service_worker_context_wrapper.h
@@ -100,10 +100,10 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
   void GetAllOriginsInfo(const GetUsageInfoCallback& callback) override;
   void DeleteForOrigin(const GURL& origin,
                        const ResultCallback& callback) override;
-  void CheckHasServiceWorker(
+  void CheckServiceWorkerStatus(
       const GURL& url,
       const GURL& other_url,
-      const CheckHasServiceWorkerCallback& callback) override;
+      const CheckServiceWorkerStatusCallback& callback) override;
   void CountExternalRequestsForTest(
       const GURL& url,
       const CountExternalRequestsCallback& callback) override;
@@ -269,8 +269,9 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
       ServiceWorkerStatusCode status,
       const std::vector<ServiceWorkerRegistrationInfo>& registrations);
 
-  void DidCheckHasServiceWorker(const CheckHasServiceWorkerCallback& callback,
-                                bool has_service_worker);
+  void DidCheckServiceWorkerStatus(
+      const CheckServiceWorkerStatusCallback& callback,
+      content::ServiceWorkerStatus sw_status);
 
   void DidFindRegistrationForUpdate(
       ServiceWorkerStatusCode status,