Add a disable button to the Extension management UI.

chrome/browser/extensions/extensions_service.h

 // Copyright (c) 2009 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_EXTENSIONS_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 111 matching lines @@
 
   // Uninstalls the specified extension. Callers should only call this method
   // with extensions that exist. |external_uninstall| is a magical parameter
   // that is only used to send information to ExtensionPrefs, which external
   // callers should never set to true.
   // TODO(aa): Remove |external_uninstall| -- this information should be passed
   // to ExtensionPrefs some other way.
   void UninstallExtension(const std::string& extension_id,
                           bool external_uninstall);
 
-  // Enable a previously disabled extension and reload it. The extension should
-  // already exist in the extension prefs.
-  // TODO(mpcomplete): add DisableExtension.
+  // Enable or disable an extension. The extension must be in the opposite state
+  // before calling.
   void EnableExtension(const std::string& extension_id);
+  void DisableExtension(const std::string& extension_id);
 
   // Load the extension from the directory |extension_path|.
   void LoadExtension(const FilePath& extension_path);
 
   // Load all known extensions (used by startup and testing code).
   void LoadAllExtensions();
 
   // Check for updates (or potentially new extensions from external providers)
   void CheckForExternalUpdates();
 
@@ skipping 215 matching lines @@
 
   // A map of all external extension providers.
   typedef std::map<Extension::Location,
                    linked_ptr<ExternalExtensionProvider> > ProviderMap;
   ProviderMap external_extension_providers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionsServiceBackend);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_