Revert 13676 - Revert 131665 - Add a preference for why an extension is 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_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 69 matching lines @@
 
   enum State {
     DISABLED = 0,
     ENABLED,
     // An external extension that the user uninstalled. We should not reinstall
     // such extensions on startup.
     EXTERNAL_EXTENSION_UNINSTALLED,
     NUM_STATES
   };
 
+  // Used to record the reason an extension was disabled.
+  enum DisableReason {
+    DISABLE_UNKNOWN,
+    DISABLE_USER_ACTION,
+    DISABLE_PERMISSIONS_INCREASE,
+    DISABLE_RELOAD,
+    DISABLE_LAST,  // Not used.
+  };
+
   enum InstallType {
     INSTALL_ERROR,
     DOWNGRADE,
     REINSTALL,
     UPGRADE,
     NEW_INSTALL
   };
 
   // Do not change the order of entries or remove entries in this list
   // as this is used in UMA_HISTOGRAM_ENUMERATIONs about extensions.
@@ skipping 1011 matching lines @@
   // only contain the removed permissions.
   const ExtensionPermissionSet* permissions;
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const ExtensionPermissionSet* permissions,
       Reason reason);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_