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diff --git a/chrome/browser/browsing_data_appcache_helper.h b/chrome/browser/browsing_data_appcache_helper.h
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+++ b/chrome/browser/browsing_data_appcache_helper.h
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+// Copyright (c) 2010 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 CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
+#define CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/scoped_ptr.h"
+#include "base/task.h"
+#include "chrome/common/appcache/chrome_appcache_service.h"
+
+class Profile;
+
+// This class fetches appcache information on behalf of a caller
+// on the UI thread.
+class BrowsingDataAppCacheHelper
+    : public base::RefCountedThreadSafe<BrowsingDataAppCacheHelper> {
+ public:
+  // Contains detailed information about an appcache.
+  struct AppCacheInfo {
+    AppCacheInfo() {}
+    AppCacheInfo(const GURL& manifest_url,
+                 int64 size,
+                 base::Time creation_time,
+                 base::Time last_access_time,
+                 int64 group_id)
+        : manifest_url(manifest_url),
+          size(size),
+          creation_time(creation_time),
+          last_access_time(last_access_time),
+          group_id(group_id) {
+    }
+
+    GURL manifest_url;
+    int64 size;
+    base::Time creation_time;
+    base::Time last_access_time;
+    int64 group_id;
+  };
+
+  explicit BrowsingDataAppCacheHelper(Profile* profile);
+
+  virtual void StartFetching(Callback0::Type* completion_callback);
+  virtual void CancelNotification();
+  virtual void DeleteAppCache(int64 group_id);
+
+  const std::vector<AppCacheInfo>& info_list() const {
+    DCHECK(!is_fetching_);
+    return info_list_;
+  }
+
+ private:
+  friend class base::RefCountedThreadSafe<BrowsingDataAppCacheHelper>;
+  friend class MockBrowsingDataAppCacheHelper;
+
+  virtual ~BrowsingDataAppCacheHelper() {}
+
+  void StartFetchingInIOThread();
+  void OnFetchComplete();
+  void DeleteAppCacheInIOThread(int64 group_id);
+
+  bool is_fetching_;
+  std::vector<AppCacheInfo> info_list_;
+  scoped_ptr<Callback0::Type> completion_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowsingDataAppCacheHelper);
+};
+
+#endif  // CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_