PlzNavigate: Make ServiceWorker work with PlzNavigate.

content/browser/service_worker/service_worker_dispatcher_host.cc

Index: content/browser/service_worker/service_worker_dispatcher_host.cc
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.cc b/content/browser/service_worker/service_worker_dispatcher_host.cc
index c192d96e37110d5e35316776283d4de9afe29874..2468131dd1a200800e3e465d0c407e07931256cf 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.cc
+++ b/content/browser/service_worker/service_worker_dispatcher_host.cc
@@ -735,10 +735,26 @@ void ServiceWorkerDispatcherHost::OnProviderCreated(
                                     bad_message::SWDH_PROVIDER_CREATED_NO_HOST);
     return;
   }
-  scoped_ptr<ServiceWorkerProviderHost> provider_host(
-      new ServiceWorkerProviderHost(render_process_id_, route_id, provider_id,
-                                    provider_type, GetContext()->AsWeakPtr(),
-                                    this));
+
+  scoped_ptr<ServiceWorkerProviderHost> provider_host;
+  if (ServiceWorkerUtils::IsBrowserAssignedProviderId(provider_id)) {
+    // PlzNavigate
+    // Retrieve the provider host previously created for navigation requests.
+    provider_host = GetContext()->TakeNavigationProviderHost(provider_id);
+    if (provider_host == nullptr) {
+      bad_message::ReceivedBadMessage(
+          this, bad_message::SWDH_PROVIDER_CREATED_NO_HOST);
+      return;
+    }
+    DCHECK_EQ(SERVICE_WORKER_PROVIDER_FOR_WINDOW, provider_type);
+    provider_host->CompleteNavigationInitialized(render_process_id_, route_id,
+                                                 this);
+  } else {
+    provider_host =
+        scoped_ptr<ServiceWorkerProviderHost>(new ServiceWorkerProviderHost(
+            render_process_id_, route_id, provider_id, provider_type,
+            GetContext()->AsWeakPtr(), this));
+  }
   GetContext()->AddProviderHost(provider_host.Pass());
 }