ServiceWorker: Fix matching registration info missing during shift-reload.

content/browser/service_worker/service_worker_provider_host.cc

Index: content/browser/service_worker/service_worker_provider_host.cc
diff --git a/content/browser/service_worker/service_worker_provider_host.cc b/content/browser/service_worker/service_worker_provider_host.cc
index 599047519bc3e313936a6e6c7b1b44f56bd9c907..1626c49085998635b21bbdae306ad0103cfd5e6f 100644
--- a/content/browser/service_worker/service_worker_provider_host.cc
+++ b/content/browser/service_worker/service_worker_provider_host.cc
@@ -302,6 +302,24 @@ ServiceWorkerProviderHost::MatchRegistration() const {
   return nullptr;
 }
 
+void ServiceWorkerProviderHost::CopyMatchingRegistrations() {
+  for (scoped_ptr<ServiceWorkerContextCore::ProviderHostIterator> it =
+            context_->GetProviderHostIterator();
+       !it->IsAtEnd(); it->Advance()) {
+    ServiceWorkerProviderHost* host = it->GetProviderHost();
+    if (host->render_process_id_ != render_process_id_ ||
+        host->render_frame_id_ != render_frame_id_ ||
+        host->document_url_ != document_url_)
+      continue;
+    // This is possible in some tests.
+    if (host == this)
+      continue;
+    for (auto& key_registration : host->matching_registrations_)
+      AddMatchingRegistration(key_registration.second.get());
+    break;
+  }
+}
+
 void ServiceWorkerProviderHost::NotifyControllerLost() {
   SetControllerVersionAttribute(nullptr, true /* notify_controllerchange */);
 }