ServiceWorker: Add support for .skipWaiting and controllerchange event(2/3)

content/browser/service_worker/service_worker_provider_host.cc

 // 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.
 
 #include "content/browser/service_worker/service_worker_provider_host.h"
 
 #include "base/stl_util.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_context_request_handler.h"
@@ skipping 37 matching lines @@
     DecreaseProcessReference(*it);
   }
 }
 
 void ServiceWorkerProviderHost::OnRegistrationFailed(
     ServiceWorkerRegistration* registration) {
   DCHECK_EQ(associated_registration_.get(), registration);
   DisassociateRegistration();
 }
 
+void ServiceWorkerProviderHost::OnVersionAttributesChanged(
+    ServiceWorkerRegistration* registration,
+    ChangedVersionAttributesMask changed_mask,
+    const ServiceWorkerRegistrationInfo& info) {
+  DCHECK_EQ(associated_registration_.get(), registration);
+  scoped_refptr<ServiceWorkerVersion> active_version =
+      registration->active_version();
+  if (active_version.get() && active_version->skip_waiting() &&
+      active_version->status() == ServiceWorkerVersion::INSTALLED) {
+    active_version->RegisterStatusChangeCallback(
+        base::Bind(&ServiceWorkerProviderHost::SetControllerVersionAttribute,
+                   AsWeakPtr(), active_version));
+  }
+}
+
 void ServiceWorkerProviderHost::SetDocumentUrl(const GURL& url) {
   DCHECK(!url.has_ref());
   document_url_ = url;
 }
 
 void ServiceWorkerProviderHost::SetTopmostFrameUrl(const GURL& url) {
   topmost_frame_url_ = url;
 }
 
 void ServiceWorkerProviderHost::SetControllerVersionAttribute(
@@ skipping 176 matching lines @@
     context_->process_manager()->RemoveProcessReferenceFromPattern(
         pattern, process_id_);
   }
 }
 
 bool ServiceWorkerProviderHost::IsContextAlive() {
   return context_ != NULL;
 }
 
 }  // namespace content