ServiceWorker: Make '.ready' return a promise to be resolved with ServiceWorkerRegistration (1/3)

public/platform/WebServiceWorkerProviderClient.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 18 matching lines @@
  */
 
 #ifndef WebServiceWorkerProviderClient_h
 #define WebServiceWorkerProviderClient_h
 
 #include "public/platform/WebMessagePortChannel.h"
 
 namespace blink {
 
 class WebServiceWorker;
+class WebServiceWorkerRegistration;
 class WebString;
 
 // This class is the interface for embedders to talk to
 // ServiceWorkerContainer.
 class WebServiceWorkerProviderClient {
 public:
     virtual ~WebServiceWorkerProviderClient() { }
 
-    virtual void setActive(WebServiceWorker*) = 0;
-    virtual void setController(WebServiceWorker*) = 0;
+    // FIXME: Remove these unnecessary interfaces (http://crbug.com/404982).
     virtual void setInstalling(WebServiceWorker*) = 0;
     virtual void setWaiting(WebServiceWorker*) = 0;
+    virtual void setActive(WebServiceWorker*) = 0;
+
+    virtual void setController(WebServiceWorker*) = 0;
+    virtual void setReadyRegistration(WebServiceWorkerRegistration*) = 0;
 
     virtual void dispatchMessageEvent(const WebString& message, const WebMessagePortChannelArray&) = 0;
 };
 
-};
+} // namespace blink
 
 #endif // WebServiceWorkerProviderClient_h