Add a test to cover service worker update codepath when extension is updated

content/public/browser/service_worker_context.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 
 #include <set>
 #include <string>
 
@@ skipping 52 matching lines @@
   //  * No Service Worker was registered for |pattern|.
   //  * Something unexpected goes wrong, like a renderer crash.
   virtual void UnregisterServiceWorker(const Scope& pattern,
                                        const ResultCallback& callback) = 0;
 
   // Methods used in response to browsing data and quota manager requests.
   virtual void GetAllOriginsInfo(const GetUsageInfoCallback& callback) = 0;
   virtual void DeleteForOrigin(const GURL& origin_url,
                                const ResultCallback& callback) = 0;
 
+  // Forces updating of ServiceWorker before next page load.
+  // Used to clear stale ServiceWorker when an extension is updated.
+  virtual void SetForceUpdateOnPageLoadForOrigin(const GURL& origin) = 0;
+
   // Returns true if a Service Worker registration exists that matches |url|,
   // and if |other_url| falls inside the scope of the same registration. Note
   // this still returns true even if there is a Service Worker registration
   // which has a longer match for |other_url|.
   // This function can be called from any thread, but the callback will always
   // be called on the UI thread.
   virtual void CheckHasServiceWorker(
       const GURL& url,
       const GURL& other_url,
       const CheckHasServiceWorkerCallback& callback) = 0;
 
   // Stops all running workers on the given |origin|.
   virtual void StopAllServiceWorkersForOrigin(const GURL& origin) = 0;
 
   // Stops all running service workers and unregisters all service worker
   // registrations. This method is used in LayoutTests to make sure that the
   // existing service worker will not affect the succeeding tests.
   virtual void ClearAllServiceWorkersForTest(const base::Closure& callback) = 0;
 
  protected:
   ServiceWorkerContext() {}
   virtual ~ServiceWorkerContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_