Move ServiceWorker public headers to public/{web,platform}/modules/serviceworker (1/3)

public/platform/WebServiceWorkerProxy.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WebServiceWorkerProxy_h
-#define WebServiceWorkerProxy_h
-
-#include "public/platform/WebCommon.h"
-
-namespace blink {
-
-// A proxy interface, passed via WebServiceWorker.setProxy() from blink to
-// the embedder, to talk to the ServiceWorker object from embedder.
-class BLINK_PLATFORM_EXPORT WebServiceWorkerProxy {
-public:
-    // Notifies the proxy that the service worker state changed. The new state
-    // should be accessible via WebServiceWorker.state().
-    virtual void dispatchStateChangeEvent() = 0;
-
-protected:
-    virtual ~WebServiceWorkerProxy() { }
-};
-
-} // namespace blink
-
-#endif // WebServiceWorkerProxy_h
+#include "public/platform/modules/serviceworker/WebServiceWorkerProxy.h"