Make nesting/running states a RunLoop rather than a MessageLoop concept.

chrome/browser/ui/views/simple_message_box_views.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/ui/simple_message_box.h"
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 204 matching lines @@
                                     const base::string16& no_text,
                                     const base::string16& checkbox_text) {
   startup_metric_utils::SetNonBrowserUIDisplayed();
   if (internal::g_should_skip_message_box_for_test)
     return MESSAGE_BOX_RESULT_YES;
 
   // Views dialogs cannot be shown outside the UI thread message loop or if the
   // ResourceBundle is not initialized yet.
   // Fallback to logging with a default response or a Windows MessageBox.
 #if defined(OS_WIN)
-  if (!base::MessageLoopForUI::IsCurrent() ||
-      !base::MessageLoopForUI::current()->is_running() ||
+  if (!base::RunLoop::IsRunningOnCurrentThread() ||
       !ResourceBundle::HasSharedInstance()) {
     LOG_IF(ERROR, !checkbox_text.empty()) << "Dialog checkbox won't be shown";
     int result = ui::MessageBox(views::HWNDForNativeWindow(parent), message,
                                 title, GetMessageBoxFlagsFromType(type));
     return (result == IDYES || result == IDOK) ?
         MESSAGE_BOX_RESULT_YES : MESSAGE_BOX_RESULT_NO;
   }
 #else
   if (!base::MessageLoopForUI::IsCurrent() ||
       !ResourceBundle::HasSharedInstance()) {
@@ skipping 53 matching lines @@
 MessageBoxResult ShowMessageBoxWithButtonText(gfx::NativeWindow parent,
                                               const base::string16& title,
                                               const base::string16& message,
                                               const base::string16& yes_text,
                                               const base::string16& no_text) {
   return ShowMessageBoxImpl(parent, title, message, MESSAGE_BOX_TYPE_QUESTION,
                             yes_text, no_text, base::string16());
 }
 
 }  // namespace chrome