Update CrOS to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.cc

 // 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.
 
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
 
 #include "ash/screensaver/screensaver_view.h"
 #include "ash/shell.h"
 #include "ash/wm/user_activity_detector.h"
 #include "base/bind.h"
@@ skipping 82 matching lines @@
     const base::FilePath& extension_base_path,
     const base::FilePath& screensaver_extension_path) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 
   std::string error;
   scoped_refptr<Extension> screensaver_extension =
       extension_file_util::LoadExtension(screensaver_extension_path,
                                          extensions::Manifest::COMPONENT,
                                          Extension::NO_FLAGS,
                                          &error);
-  if (!screensaver_extension) {
+  if (!screensaver_extension.get()) {
     LOG(ERROR) << "Could not load screensaver extension from: "
                << screensaver_extension_path.value() << " due to: " << error;
     NotifyAppPackOfDamagedFile();
     return;
   }
 
   content::BrowserThread::PostTask(
       content::BrowserThread::UI,
       FROM_HERE,
       base::Bind(
@@ skipping 100 matching lines @@
 
   // If the user is already logged in, don't need to display the screensaver.
   if (chromeos::LoginState::Get()->IsUserLoggedIn())
     return;
 
   ash::Shell::GetInstance()->user_activity_detector()->AddObserver(this);
 
   Profile* default_profile = ProfileManager::GetDefaultProfile();
   // Add the extension to the extension service and display the screensaver.
   if (default_profile) {
-    extensions::ExtensionSystem::Get(default_profile)->extension_service()->
-        AddExtension(extension);
+    extensions::ExtensionSystem::Get(default_profile)->extension_service()
+        ->AddExtension(extension.get());
     ash::ShowScreensaver(
-        extensions::AppLaunchInfo::GetFullLaunchURL(extension));
+        extensions::AppLaunchInfo::GetFullLaunchURL(extension.get()));
   } else {
     LOG(ERROR) << "Couldn't get default profile. Unable to load screensaver!";
     ShutdownKioskModeScreensaver();
   }
 }
 
 void KioskModeScreensaver::OnUserActivity() {
   // We don't want to handle further user notifications; we'll either login
   // the user and close out or or at least close the screensaver.
   ash::Shell::GetInstance()->user_activity_detector()->RemoveObserver(this);
@@ skipping 36 matching lines @@
 
   g_kiosk_mode_screensaver = new KioskModeScreensaver();
 }
 
 void ShutdownKioskModeScreensaver() {
   delete g_kiosk_mode_screensaver;
   g_kiosk_mode_screensaver = NULL;
 }
 
 }  // namespace chromeos