favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/chromeos/

chrome/browser/chromeos/login/screens/update_screen.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/screens/update_screen.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 65 matching lines @@
     else
       screen->ExitUpdate(UpdateScreen::REASON_UPDATE_INIT_FAILED);
   }
 }
 
 }  // anonymous namespace
 
 // static
 UpdateScreen::InstanceSet& UpdateScreen::GetInstanceSet() {
   CR_DEFINE_STATIC_LOCAL(std::set<UpdateScreen*>, instance_set, ());
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));  // not threadsafe.
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);  // not threadsafe.
   return instance_set;
 }
 
 // static
 bool UpdateScreen::HasInstance(UpdateScreen* inst) {
   InstanceSet& instance_set = GetInstanceSet();
   InstanceSet::iterator found = instance_set.find(inst);
   return (found != instance_set.end());
 }
 
@@ skipping 468 matching lines @@
 }
 
 void UpdateScreen::SetHostPairingControllerStatus(
     HostPairingController::UpdateStatus update_status) {
   if (remora_controller_) {
     remora_controller_->OnUpdateStatusChanged(update_status);
   }
 }
 
 }  // namespace chromeos