Introducing the WebServiceWorkerCacheStorage.

public/web/WebServiceWorkerContextClient.h

Index: public/web/WebServiceWorkerContextClient.h
diff --git a/public/web/WebServiceWorkerContextClient.h b/public/web/WebServiceWorkerContextClient.h
index 0a787469810b9966f2db9973a9b53f046832bb4b..33cae411488cad74b45c770fec475161a9628fbe 100644
--- a/public/web/WebServiceWorkerContextClient.h
+++ b/public/web/WebServiceWorkerContextClient.h
@@ -40,6 +40,7 @@
 namespace blink {
 
 class WebDataSource;
+class WebServiceWorkerCacheStorage;
 class WebServiceWorkerContextProxy;
 class WebServiceWorkerNetworkProvider;
 class WebServiceWorkerResponse;
@@ -57,6 +58,9 @@ class WebServiceWorkerContextClient {
 public:
     virtual ~WebServiceWorkerContextClient() { }
 
+    // ServiceWorker specific method.
+    virtual WebServiceWorkerCacheStorage* cacheStorage() { return 0; }
+
     // ServiceWorker specific method. Called when script accesses the
     // the |scope| attribute of the ServiceWorkerGlobalScope. Immutable per spec.
     virtual WebURL scope() const { return WebURL(); }
@@ -132,4 +136,4 @@ public:
 
 } // namespace blink
 
-#endif // WebWorkerContextClient_h
+#endif // WebServiceWorkerContextClient_h