Extract permission alias info from PermissionsProvider

chrome/common/extensions/chrome_alias_provider.h

+// Copyright 2016 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_COMMON_EXTENSIONS_CHROME_ALIAS_PROVIDER_H_
+#define CHROME_COMMON_EXTENSIONS_CHROME_ALIAS_PROVIDER_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "extensions/common/alias_provider.h"
+
+namespace extensions {
+
+class ChromeAliasProvider : public AliasProvider {
+ public:
+  ChromeAliasProvider();
+  ~ChromeAliasProvider() override = default;
+
+ private:
+  // Returns all the known permission aliases.
+  std::vector<Alias> GetApiAliases() const override;
+  std::vector<Alias> GetPermissionAliases() const override;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeAliasProvider);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_CHROME_ALIAS_PROVIDER_H_