Make Blacklist::IsBlacklist asynchronous (it will need to be for safe

chrome/browser/extensions/test_blacklist.h

+// Copyright 2012 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_EXTENSIONS_TEST_BLACKLIST_H_
+#define CHROME_BROWSER_EXTENSIONS_TEST_BLACKLIST_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace extensions {
+
+class Blacklist;
+
+// A wrapper for an extensions::Blacklist that provides functionality for
+// testing.
+class TestBlacklist {
+ public:
+  explicit TestBlacklist(Blacklist* blacklist);
+
+  Blacklist* blacklist() { return blacklist_; }
+
+  bool IsBlacklisted(const std::string& extension_id);
+
+ private:
+  Blacklist* blacklist_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestBlacklist);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_TEST_BLACKLIST_H_