Add RetainedRef uses where needed.

extensions/shell/browser/shell_extension_system.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 "extensions/shell/browser/shell_extension_system.h"
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 133 matching lines @@
   return quota_service_.get();
 }
 
 AppSorting* ShellExtensionSystem::app_sorting() {
   return app_sorting_.get();
 }
 
 void ShellExtensionSystem::RegisterExtensionWithRequestContexts(
     const Extension* extension,
     const base::Closure& callback) {
-  BrowserThread::PostTaskAndReply(BrowserThread::IO, FROM_HERE,
-                                  base::Bind(&InfoMap::AddExtension, info_map(),
-                                             make_scoped_refptr(extension),
-                                             base::Time::Now(), false, false),
-                                  callback);
+  BrowserThread::PostTaskAndReply(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&InfoMap::AddExtension, info_map(),
+                 base::RetainedRef(extension), base::Time::Now(), false, false),
+      callback);
 }
 
 void ShellExtensionSystem::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
 }
 
 const OneShotEvent& ShellExtensionSystem::ready() const {
   return ready_;
 }
@@ skipping 14 matching lines @@
 }
 
 void ShellExtensionSystem::OnExtensionRegisteredWithRequestContexts(
     scoped_refptr<Extension> extension) {
   ExtensionRegistry* registry = ExtensionRegistry::Get(browser_context_);
   registry->AddReady(extension);
   registry->TriggerOnReady(extension.get());
 }
 
 }  // namespace extensions