[Background Sync] Remove single-parameter sync dispatch methods

public/web/WebServiceWorkerContextProxy.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 56 matching lines @@
 
     virtual void dispatchCrossOriginConnectEvent(int eventID, const WebCrossOriginServiceWorkerClient&) = 0;
 
     virtual void dispatchCrossOriginMessageEvent(const WebCrossOriginServiceWorkerClient&, const WebString& message, const WebMessagePortChannelArray&) = 0;
 
     // Passes ownership of the callbacks.
     virtual void dispatchServicePortConnectEvent(WebServicePortConnectEventCallbacks*, const WebURL& targetURL, const WebString& origin, WebServicePortID) = 0;
 
     // Once the ServiceWorker has finished handling the sync event,
     // didHandleSyncEvent is called on the context client.
-    // TODO(iclelland): Remove the single-parameter version once all call sites
-    // have been updated.
-    virtual void dispatchSyncEvent(int syncEventID) = 0;
     virtual void dispatchSyncEvent(int syncEventID, const WebSyncRegistration&) = 0;
 
     virtual void addStashedMessagePorts(const WebMessagePortChannelArray& channels, const WebVector<WebString>& channelNames) {}
 };
 
 } // namespace blink
 
 #endif // WebServiceWorkerContextProxy_h