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diff --git a/chromium/content/browser/service_worker/service_worker_script_cache_map.h b/chromium/content/browser/service_worker/service_worker_script_cache_map.h
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index 00000000000..4513f3d9ea7
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+++ b/chromium/content/browser/service_worker/service_worker_script_cache_map.h
@@ -0,0 +1,62 @@
+// 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CACHE_MAP_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CACHE_MAP_H_
+
+#include <map>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/weak_ptr.h"
+#include "content/browser/service_worker/service_worker_database.h"
+
+class GURL;
+
+namespace content {
+
+class ServiceWorkerContextCore;
+class ServiceWorkerVersion;
+
+// Class that maintains the mapping between urls and a resource id
+// for a particular versions implicit script resources.
+class ServiceWorkerScriptCacheMap {
+ public:
+  int64 Lookup(const GURL& url);
+
+  // Used during the initial run of a new version to build the map
+  // of resources ids.
+  void NotifyStartedCaching(const GURL& url, int64 resource_id);
+  void NotifyFinishedCaching(const GURL& url, bool success);
+
+  // Used to retrieve the results of the initial run of a new version.
+  bool HasError() const { return has_error_; }
+  void GetResources(
+      std::vector<ServiceWorkerDatabase::ResourceRecord>* resources);
+
+  // Used when loading an existing version.
+  void SetResources(
+     const std::vector<ServiceWorkerDatabase::ResourceRecord>& resources);
+
+ private:
+  typedef std::map<GURL, int64> ResourceIDMap;
+
+  // The version objects owns its script cache and provides a rawptr to it.
+  friend class ServiceWorkerVersion;
+  ServiceWorkerScriptCacheMap(
+      ServiceWorkerVersion* owner,
+      base::WeakPtr<ServiceWorkerContextCore> context);
+  ~ServiceWorkerScriptCacheMap();
+
+  ServiceWorkerVersion* owner_;
+  base::WeakPtr<ServiceWorkerContextCore> context_;
+  ResourceIDMap resource_ids_;
+  bool has_error_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerScriptCacheMap);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CACHE_MAP_H_