[ServiceWorker] Use WebPageVisibilityState in ClientInfo.

content/renderer/service_worker/service_worker_script_context.cc

 // 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.
 
 #include "content/renderer/service_worker/service_worker_script_context.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "content/child/notifications/notification_data_conversions.h"
@@ skipping 396 matching lines @@
   if (!callbacks) {
     NOTREACHED() << "Got stray response: " << request_id;
     return;
   }
   scoped_ptr<blink::WebServiceWorkerClientsInfo> info(
       new blink::WebServiceWorkerClientsInfo);
   blink::WebVector<blink::WebServiceWorkerClientInfo> convertedClients(
       clients.size());
   for (size_t i = 0; i < clients.size(); ++i) {
     convertedClients[i].clientID = clients[i].client_id;
-    convertedClients[i].visibilityState =
-        blink::WebString::fromUTF8(clients[i].visibility_state);
+    convertedClients[i].pageVisibilityState = clients[i].page_visibility_state;
     convertedClients[i].isFocused = clients[i].is_focused;
     convertedClients[i].url = clients[i].url;
     convertedClients[i].frameType =
         static_cast<blink::WebURLRequest::FrameType>(clients[i].frame_type);
   }
   info->clients.swap(convertedClients);
   callbacks->onSuccess(info.release());
   pending_clients_callbacks_.Remove(request_id);
 }
 
@@ skipping 18 matching lines @@
       pending_skip_waiting_callbacks_.Lookup(request_id);
   if (!callbacks) {
     NOTREACHED() << "Got stray response: " << request_id;
     return;
   }
   callbacks->onSuccess();
   pending_skip_waiting_callbacks_.Remove(request_id);
 }
 
 }  // namespace content