[Background Sync] Add sync registration details to onsync event

Source/web/ServiceWorkerGlobalScopeProxy.h

Index: Source/web/ServiceWorkerGlobalScopeProxy.h
diff --git a/Source/web/ServiceWorkerGlobalScopeProxy.h b/Source/web/ServiceWorkerGlobalScopeProxy.h
index e7902cf94e1e2cf23315ef6d9fe4b0e68b2628a7..58a088682171b9bfa0f67fedd46f7f6cfef74cd7 100644
--- a/Source/web/ServiceWorkerGlobalScopeProxy.h
+++ b/Source/web/ServiceWorkerGlobalScopeProxy.h
@@ -46,6 +46,7 @@ class ServiceWorkerGlobalScope;
 class WebEmbeddedWorkerImpl;
 class WebServiceWorkerContextClient;
 class WebServiceWorkerRequest;
+struct WebSyncRegistration;
 
 // This class is created and destructed on the main thread, but live most
 // of its time as a resident of the worker thread.
@@ -79,7 +80,10 @@ public:
     void dispatchNotificationClickEvent(int, int64_t notificationID, const WebNotificationData&) override;
     void dispatchPushEvent(int, const WebString& data) override;
     void dispatchServicePortConnectEvent(WebServicePortConnectEventCallbacks*, const WebURL& targetURL, const WebString& origin, WebServicePortID) override;
+    // TODO(iclelland): Remove the single-parameter version once all call sites
+    // have been updated.
     void dispatchSyncEvent(int) override;
+    void dispatchSyncEvent(int, const WebSyncRegistration&) override;
     void addStashedMessagePorts(const WebMessagePortChannelArray&, const WebVector<WebString>& webChannelNames) override;
 
     // WorkerReportingProxy overrides: