Make ComponentInstaller refcounted.

chrome/browser/component_updater/supervised_user_whitelist_installer.cc

 // 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.
 
 #include "chrome/browser/component_updater/supervised_user_whitelist_installer.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
@@ skipping 121 matching lines @@
 }
 
 void SupervisedUserWhitelistInstallerImpl::RegisterWhitelist(
     const std::string& crx_id,
     const std::string& name,
     bool newly_added,
     const WhitelistReadyCallback& callback) {
   scoped_ptr<ComponentInstallerTraits> traits(
       new SupervisedUserWhitelistComponentInstallerTraits(crx_id, name,
                                                           callback));
-  DefaultComponentInstaller* installer =
-      new DefaultComponentInstaller(traits.Pass());
+  scoped_refptr<DefaultComponentInstaller> installer(
+      new DefaultComponentInstaller(traits.Pass()));
 
-  // Takes ownership of |installer|.
   installer->Register(cus_);
 
   if (newly_added)
     TriggerComponentUpdate(&cus_->GetOnDemandUpdater(), crx_id);
 }
 
 void SupervisedUserWhitelistInstallerImpl::UnregisterWhitelist(
     const std::string& id) {
   // TODO(bauerb): Implement!
   NOTIMPLEMENTED();
@@ skipping 30 matching lines @@
 }
 
 // static
 void SupervisedUserWhitelistInstaller::TriggerComponentUpdate(
     OnDemandUpdater* updater,
     const std::string& crx_id) {
   updater->OnDemandUpdate(crx_id);
 }
 
 }  // namespace component_updater