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diff --git a/webkit/quota/special_storage_policy.h b/webkit/quota/special_storage_policy.h
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+++ b/webkit/quota/special_storage_policy.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 WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_
+#define WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_
+
+#include "base/ref_counted.h"
+
+class GURL;
+
+namespace quota {
+
+// Special rights are granted to 'extensions' and 'applications'. The
+// storage subsystems query this interface to determine which origins
+// have these rights. Chrome provides an impl that is cognizant of what
+// is currently installed in the extensions system.
+// An implementation must be thread-safe.
+class SpecialStoragePolicy
+    : public base::RefCountedThreadSafe<SpecialStoragePolicy> {
+ public:
+  // Protected storage is not subject to removal by the browsing data remover.
+  virtual bool IsStorageProtected(const GURL& origin) = 0;
+
+  // Unlimited storage is not subject to 'quotas'.
+  virtual bool IsStorageUnlimited(const GURL& origin) = 0;
+};
+
+}  // namespace quota
+
+#endif  // WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_