Delay determination of why a synced disabled extension was disabled.

chrome/common/extensions/extension.h

 // Copyright (c) 2012 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_EXTENSION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 103 matching lines @@
     DEPRECATED_DISABLE_LAST,  // Not used.
   };
 
   enum DisableReason {
     DISABLE_NONE = 0,
     DISABLE_USER_ACTION = 1 << 0,
     DISABLE_PERMISSIONS_INCREASE = 1 << 1,
     DISABLE_RELOAD = 1 << 2,
     DISABLE_UNSUPPORTED_REQUIREMENT = 1 << 3,
     DISABLE_SIDELOAD_WIPEOUT = 1 << 4,
+    DISABLE_UNKNOWN_FROM_SYNC = 1 << 5,
   };
 
   enum InstallType {
     INSTALL_ERROR,
     DOWNGRADE,
     REINSTALL,
     UPGRADE,
     NEW_INSTALL
   };
 
@@ skipping 1185 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_