Extensions: Store disable reasons in Sync

chrome/browser/extensions/extension_service.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_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 261 matching lines @@
   // deletion is done or at least is scheduled.
   virtual bool UninstallExtension(const std::string& extension_id,
                                   extensions::UninstallReason reason,
                                   const base::Closure& deletion_done_callback,
                                   base::string16* error);
 
   // Enables the extension.  If the extension is already enabled, does
   // nothing.
   virtual void EnableExtension(const std::string& extension_id);
 
-  // Disables the extension.  If the extension is already disabled, or
-  // cannot be disabled, does nothing.
-  virtual void DisableExtension(
-      const std::string& extension_id,
-      extensions::Extension::DisableReason disable_reason);
+  // Disables the extension. If the extension is already disabled, just adds
+  // the |disable_reasons| (a bitmask of Extension::DisableReason - there can
+  // be multiple DisableReasons e.g. when an extension comes in disabled from
+  // Sync). If the extension cannot be disabled (due to policy), does nothing.
+  virtual void DisableExtension(const std::string& extension_id,
+                                int disable_reasons);
 
   // Disable non-default and non-managed extensions with ids not in
   // |except_ids|. Default extensions are those from the Web Store with
   // |was_installed_by_default| flag.
   void DisableUserExtensions(const std::vector<std::string>& except_ids);
 
   // Puts all extensions in a blocked state: Unloading every extension, and
   // preventing them from ever loading until UnblockAllExtensions is called.
   // This state is stored in preferences, so persists until Chrome restarts.
   //
@@ skipping 466 matching lines @@
                            GreylistUnknownDontChange);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            ManagementPolicyProhibitsEnableOnInstalled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            BlockAndUnblockBlacklistedExtension);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_