Extract permission alias info from PermissionsProvider

extensions/common/extensions_alias_provider.h

Index: extensions/common/extensions_alias_provider.h
diff --git a/extensions/common/extensions_alias_provider.h b/extensions/common/extensions_alias_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..a51882361edc56046f060670c57f001d6783b030
--- /dev/null
+++ b/extensions/common/extensions_alias_provider.h
@@ -0,0 +1,30 @@
+// 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 EXTENSIONS_COMMON_EXTENSIONS_ALIAS_PROVIDER_H_
+#define EXTENSIONS_COMMON_EXTENSIONS_ALIAS_PROVIDER_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "extensions/common/alias_provider.h"
+
+namespace extensions {
+
+class ExtensionsAliasProvider : public AliasProvider {
+ public:
+  ExtensionsAliasProvider();
+  ~ExtensionsAliasProvider() override = default;
+
+ private:
+  std::vector<Alias> GetApiAliases() const override;
+  std::vector<Alias> GetPermissionAliases() const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ExtensionsAliasProvider);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_EXTENSIONS_ALIAS_PROVIDER_H_