Add the IDL and stub implementation for the chrome.passwordsPrivate API.

extensions/common/permissions/api_permission.h

 // 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_API_PERMISSION_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_API_PERMISSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 140 matching lines @@
     kMetricsPrivate,
     kMDns,
     kMusicManagerPrivate,
     kNativeMessaging,
     kNetworkingConfig,
     kNetworkingPrivate,
     kNotificationProvider,
     kNotifications,
     kOverrideEscFullscreen,
     kPageCapture,
+    kPasswordsPrivate,
     kPointerLock,
     kPlatformKeys,
     kPlugin,
     kPower,
     kPreferencesPrivate,
     kPrincipalsPrivate,
     kPrinterProvider,
     kPrivacy,
     kProcesses,
     kProxy,
@@ skipping 280 matching lines @@
   const char* const name_;
   const int flags_;
   const int l10n_message_id_;
   const PermissionMessage::ID message_id_;
   const APIPermissionConstructor api_permission_constructor_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_API_PERMISSION_H_