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

chrome/browser/chromeos/login/screen_locker.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/login/screen_locker.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 381 matching lines @@
   g_screen_lock_observer.Get();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ScreenLocker, private:
 
 ScreenLocker::~ScreenLocker() {
   VLOG(1) << "Destroying ScreenLocker " << this;
   DCHECK(base::MessageLoop::current()->type() == base::MessageLoop::TYPE_UI);
 
-  if (authenticator_)
+  if (authenticator_.get())
     authenticator_->SetConsumer(NULL);
   ClearErrors();
 
   VLOG(1) << "Moving desktop background to unlocked container";
   ash::Shell::GetInstance()->
       desktop_background_controller()->MoveDesktopToUnlockedContainer();
 
   screen_locker_ = NULL;
   bool state = false;
   VLOG(1) << "Emitting SCREEN_LOCK_STATE_CHANGED with state=" << state;
@@ skipping 38 matching lines @@
 bool ScreenLocker::IsUserLoggedIn(const std::string& username) {
   for (UserList::const_iterator it = users_.begin(); it != users_.end(); ++it) {
     if ((*it)->email() == username)
       return true;
   }
   return false;
 }
 
 }  // namespace chromeos