Add support for uninstalling components and use it in SupervisedUserWhitelistInstaller.

chrome/browser/component_updater/supervised_user_whitelist_installer.h

 // Copyright 2014 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_COMPONENT_UPDATER_SUPERVISED_USER_WHITELIST_INSTALLER_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_SUPERVISED_USER_WHITELIST_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 29 matching lines @@
   // Registers a new whitelist with the given CRX ID and name.
   // |new_installation| should be set to true if the whitelist is not installed
   // locally yet, to trigger installation.
   // |callback| will be called when the whitelist is installed (for new
   // installations) or updated.
   virtual void RegisterWhitelist(const std::string& crx_id,
                                  const std::string& name,
                                  bool new_installation,
                                  const WhitelistReadyCallback& callback) = 0;
 
-  // Unregisters a whitelist.
-  virtual void UnregisterWhitelist(const std::string& crx_id) = 0;
+  // Uninstalls a whitelist.
+  virtual void UninstallWhitelist(const std::string& crx_id) = 0;
 
  protected:
   // Triggers an update for a whitelist to be installed. Protected so it can be
   // called from the implementation subclass, and declared here so that the
   // OnDemandUpdater can friend this class and the implementation subclass can
   // live in an anonymous namespace.
   static void TriggerComponentUpdate(OnDemandUpdater* updater,
                                      const std::string& crx_id);
 };
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_SUPERVISED_USER_WHITELIST_INSTALLER_H_