Introducing the WebServiceWorkerCacheStorage.

public/platform/WebServiceWorkerCacheStorage.h

Index: public/platform/WebServiceWorkerCacheStorage.h
diff --git a/public/platform/WebServiceWorkerCacheStorage.h b/public/platform/WebServiceWorkerCacheStorage.h
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+// 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 WebServiceWorkerCacheStorage_h
+#define WebServiceWorkerCacheStorage_h
+
+#include "WebCommon.h"
+#include "public/platform/WebCallbacks.h"
+#include "public/platform/WebServiceWorkerCacheStorageError.h"
+#include "public/platform/WebString.h"
+#include "public/platform/WebVector.h"
+
+namespace blink {
+
+// An interface to the CacheStorage API, implemented by the embedder and passed in to blink. Blink's implementation
+// of the ServiceWorker spec will call these methods to create/open caches, and expect callbacks from the embedder
+// after operations complete.
+class WebServiceWorkerCacheStorage {
+public:
+
+    typedef WebCallbacks<void, WebServiceWorkerCacheStorageError> CacheStorageCallbacks;
+    typedef WebCallbacks<int /* cacheID */, WebServiceWorkerCacheStorageError> CacheStorageWithCacheCallbacks;
+    typedef WebCallbacks<WebVector<WebString>, WebServiceWorkerCacheStorageError> CacheStorageKeysCallbacks;
+
+    WebServiceWorkerCacheStorage() { }
+    virtual ~WebServiceWorkerCacheStorage() { }
+
+    // Ownership of the CacheStorage*Callbacks methods passes to the WebServiceWorkerCacheStorage
+    // instance, which will delete it after calling onSuccess or onFailure.
+    virtual void dispatchCreate(CacheStorageWithCacheCallbacks*, const WebString& key) = 0;
+    virtual void dispatchRename(CacheStorageCallbacks*, const WebString& oldKey, const WebString& newKey) = 0;
+    virtual void dispatchGet(CacheStorageWithCacheCallbacks*, const WebString& key) = 0;
+    virtual void dispatchDelete(CacheStorageCallbacks*, const WebString& key) = 0;
+    virtual void dispatchKeys(CacheStorageKeysCallbacks*) = 0;
+};
+
+} // namespace blink
+
+#endif // WebServiceWorkerCacheStorage_h