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diff --git a/extensions/common/permissions/permissions_info.h b/extensions/common/permissions/permissions_info.h
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+++ b/extensions/common/permissions/permissions_info.h
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+// Copyright 2013 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_PERMISSIONS_PERMISSIONS_INFO_H_
+#define EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_INFO_H_
+
+#include <map>
+#include <set>
+#include <string>
+
+#include "base/callback.h"
+#include "base/lazy_instance.h"
+#include "extensions/common/permissions/api_permission.h"
+#include "extensions/common/permissions/api_permission_set.h"
+#include "extensions/common/permissions/permission_message.h"
+#include "extensions/common/permissions/permissions_provider.h"
+
+namespace extensions {
+
+// A global object that holds the extension permission instances and provides
+// methods for accessing them.
+class PermissionsInfo {
+ public:
+  static PermissionsInfo* GetInstance();
+
+  virtual ~PermissionsInfo();
+
+  // Returns the permission with the given |id|, and NULL if it doesn't exist.
+  const APIPermissionInfo* GetByID(APIPermission::ID id) const;
+
+  // Returns the permission with the given |name|, and NULL if none
+  // exists.
+  const APIPermissionInfo* GetByName(const std::string& name) const;
+
+  // Returns a set containing all valid api permission ids.
+  APIPermissionSet GetAll() const;
+
+  // Converts all the permission names in |permission_names| to permission ids.
+  APIPermissionSet GetAllByName(
+      const std::set<std::string>& permission_names) const;
+
+  // Checks if any permissions have names that start with |name| followed by a
+  // period.
+  bool HasChildPermissions(const std::string& name) const;
+
+  // Gets the total number of API permissions.
+  size_t get_permission_count() const { return permission_count_; }
+
+ private:
+  friend struct base::DefaultLazyInstanceTraits<PermissionsInfo>;
+
+  PermissionsInfo();
+
+  // Initializes the permissions from the provider.
+  void InitializeWithProvider(const PermissionsProvider& provider);
+
+  // Registers an |alias| for a given permission |name|.
+  void RegisterAlias(const char* name, const char* alias);
+
+  // Registers a permission with the specified attributes and flags.
+  void RegisterPermission(APIPermissionInfo* permission);
+
+  // Maps permission ids to permissions.
+  typedef std::map<APIPermission::ID, APIPermissionInfo*> IDMap;
+
+  // Maps names and aliases to permissions.
+  typedef std::map<std::string, APIPermissionInfo*> NameMap;
+
+  IDMap id_map_;
+  NameMap name_map_;
+
+  size_t hosted_app_permission_count_;
+  size_t permission_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionsInfo);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_INFO_H_