More scaffolding, add class ServiceWorkerProviderHost.

content/child/service_worker/web_service_worker_provider_impl.h

Index: content/child/service_worker/web_service_worker_provider_impl.h
diff --git a/content/child/service_worker/web_service_worker_provider_impl.h b/content/child/service_worker/web_service_worker_provider_impl.h
index 29a379fad5cce8df814a101313442b2a08dc503a..f26b078f92589cc8ca80baecef0ab2fb9315dbdb 100644
--- a/content/child/service_worker/web_service_worker_provider_impl.h
+++ b/content/child/service_worker/web_service_worker_provider_impl.h
@@ -31,11 +31,11 @@ class WebServiceWorkerProviderImpl
  public:
   WebServiceWorkerProviderImpl(
       ThreadSafeSender* thread_safe_sender,
-      ServiceWorkerMessageFilter* message_filter,
-      const blink::WebURL& origin,
       scoped_ptr<blink::WebServiceWorkerProviderClient> client);
   virtual ~WebServiceWorkerProviderImpl();
 
+  int provider_id() const { return provider_id_; }
+
   virtual void registerServiceWorker(const blink::WebURL& pattern,
                                      const blink::WebURL& script_url,
                                      WebServiceWorkerCallbacks*);
@@ -44,6 +44,7 @@ class WebServiceWorkerProviderImpl
                                        WebServiceWorkerCallbacks*);
 
  private:
+  const int provider_id_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_ptr<blink::WebServiceWorkerProviderClient> client_;