Register a Service Worker when an extension is enabled.

extensions/browser/process_manager.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 #define EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 37 matching lines @@
     return background_hosts_;
   }
 
   typedef std::set<content::RenderViewHost*> ViewSet;
   const ViewSet GetAllViews() const;
 
   // Creates a new UI-less extension instance.  Like CreateViewHost, but not
   // displayed anywhere.  Returns false if no background host can be created,
   // for example for hosted apps and extensions that aren't enabled in
   // Incognito.
-  virtual bool CreateBackgroundHost(const Extension* extension,
-                                    const GURL& url);
+  virtual bool CreateBackgroundHost(
+      const Extension* extension,
+      const GURL& url,
+      const base::Closure& continuation = base::Closure());
 
   // Gets the ExtensionHost for the background page for an extension, or NULL if
   // the extension isn't running or doesn't have a background page.
   ExtensionHost* GetBackgroundHostForExtension(const std::string& extension_id);
 
   // Returns the SiteInstance that the given URL belongs to.
   // TODO(aa): This only returns correct results for extensions and packaged
   // apps, not hosted apps.
   virtual content::SiteInstance* GetSiteInstanceForURL(const GURL& url);
 
@@ skipping 169 matching lines @@
   ImpulseCallbackForTesting keepalive_impulse_decrement_callback_for_testing_;
 
   base::WeakPtrFactory<ProcessManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PROCESS_MANAGER_H_