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

chrome/browser/chromeos/login/help_app_launcher.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/help_app_launcher.h"
 
 #include <string>
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 45 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////
 // HelpApp, protected:
 
 HelpAppLauncher::~HelpAppLauncher() {}
 
 ///////////////////////////////////////////////////////////////////////////////
 // HelpApp, private:
 
 void HelpAppLauncher::ShowHelpTopicDialog(Profile* profile,
                                           const GURL& topic_url) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   LoginWebDialog* dialog = new LoginWebDialog(
       profile,
       NULL,
       parent_window_,
       l10n_util::GetStringUTF16(IDS_LOGIN_OOBE_HELP_DIALOG_TITLE),
       topic_url);
   gfx::Rect screen_bounds(chromeos::CalculateScreenBounds(gfx::Size()));
   dialog->SetDialogSize(l10n_util::GetLocalizedContentsWidthInPixels(
                             IDS_HELP_APP_DIALOG_WIDTH_PIXELS),
                         l10n_util::GetLocalizedContentsWidthInPixels(
                             IDS_HELP_APP_DIALOG_HEIGHT_PIXELS));
   dialog->Show();
   // The dialog object will be deleted on dialog close.
 }
 
 }  // namespace chromeos