Cache Storage: Add Platform API to retrieve CacheStorage for origin

public/web/WebServiceWorkerContextClient.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 25 matching lines @@
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "public/platform/WebServiceWorkerSkipWaitingCallbacks.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 struct WebCrossOriginServiceWorkerClient;
 struct WebServiceWorkerClientQueryOptions;
 class WebDataSource;
-class WebServiceWorkerCacheStorage;
 class WebServiceWorkerContextProxy;
 class WebServiceWorkerNetworkProvider;
 class WebServiceWorkerProvider;
 class WebServiceWorkerResponse;
 class WebString;
 
 // This interface is implemented by the client. It is supposed to be created
 // on the main thread and then passed on to the worker thread by a newly
 // created WorkerGlobalScope. Unless otherwise noted, all methods of this class
 // are called on the worker thread.
 //
 // FIXME: Split this into EmbeddedWorkerContextClient and
 // ServiceWorkerScriptContextClient when we decide to use EmbeddedWorker
 // framework for other implementation (like SharedWorker).
 class WebServiceWorkerContextClient {
 public:
     virtual ~WebServiceWorkerContextClient() { }
 
-    // ServiceWorker specific method.
-    virtual WebServiceWorkerCacheStorage* cacheStorage() { return nullptr; }
-
     // ServiceWorker specific method. Called when script accesses the
     // the |scope| attribute of the ServiceWorkerGlobalScope. Immutable per spec.
     virtual WebURL scope() const { return WebURL(); }
 
     // If the worker was started with WebEmbeddedWorkerStartData indicating to pause
     // after download, this method is called after the main script resource has been
     // downloaded. The scope will not be created and the script will not be loaded until
     // WebEmbeddedWorker.resumeAfterDownload() is invoked.
     virtual void didPauseAfterDownload() { }
 
@@ skipping 110 matching lines @@
     virtual void claim(WebServiceWorkerClientsClaimCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Ownership of the passed callbacks is transferred to the callee, callee
     // should delete the callback after calling either onSuccess or onError.
     virtual void focus(const WebString& uuid, WebServiceWorkerClientCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 };
 
 } // namespace blink
 
 #endif // WebServiceWorkerContextClient_h