BackgroundSyncManager tracks client registrations

content/renderer/background_sync/background_sync_client_impl.cc

Index: content/renderer/background_sync/background_sync_client_impl.cc
diff --git a/content/renderer/background_sync/background_sync_client_impl.cc b/content/renderer/background_sync/background_sync_client_impl.cc
index 2eb1c40019da279279e19a5813eef0786524426b..14ac20c95d5948c608df2c1a34adc8fd14fb5a7f 100644
--- a/content/renderer/background_sync/background_sync_client_impl.cc
+++ b/content/renderer/background_sync/background_sync_client_impl.cc
@@ -6,6 +6,8 @@
 
 #include "content/child/background_sync/background_sync_type_converters.h"
 #include "content/renderer/service_worker/service_worker_context_client.h"
+#include "third_party/WebKit/public/platform/Platform.h"
+#include "third_party/WebKit/public/platform/modules/background_sync/WebSyncProvider.h"
 #include "third_party/WebKit/public/platform/modules/background_sync/WebSyncRegistration.h"
 
 namespace content {
@@ -30,9 +32,22 @@ void BackgroundSyncClientImpl::Sync(content::SyncRegistrationPtr registration,
     callback.Run(SERVICE_WORKER_EVENT_STATUS_ABORTED);
     return;
   }
-  scoped_ptr<blink::WebSyncRegistration> reg =
+
+  scoped_ptr<blink::WebSyncRegistration> web_registration =
       mojo::ConvertTo<scoped_ptr<blink::WebSyncRegistration>>(registration);
-  client->DispatchSyncEvent(*reg, callback);
+
+  blink::WebSyncRegistration registration_copy = *web_registration;
+
+  // The BackgroundSyncServiceImpl doesn't know about this registration yet,
+  // inform it via trackRegistration.
+  blink::WebSyncProvider* webSyncProvider =
+      blink::Platform::current()->backgroundSyncProvider();
+  DCHECK(webSyncProvider);
+
+  // trackRegistration takes ownership of web_registration.
+  webSyncProvider->trackRegistration(web_registration.release());
+
+  client->DispatchSyncEvent(registration_copy, callback);
 }
 
 }  // namespace content