Identity API: Add chrome.identity.onSignInChanged routing and IDL

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 73 matching lines @@
     kFileSystem,
     kFileSystemDirectory,
     kFileSystemRetainEntries,
     kFileSystemWrite,
     kFileSystemWriteDirectory,
     kFontSettings,
     kFullscreen,
     kGeolocation,
     kHistory,
     kIdentity,
+    kIdentityEmail,
     kIdentityPrivate,
     kIdltest,
     kIdle,
     kInfobars,
     kInput,
     kInputMethodPrivate,
     kLocation,
     kLogPrivate,
     kManagement,
     kMediaGalleries,
@@ skipping 219 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_