Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/extensions/extension_install_prompt.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/extensions/extension_install_prompt.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/extension_install_prompt_show_params.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/permissions_updater.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/extensions/extension_install_ui_factory.h"
 #include "chrome/grit/chromium_strings.h"
@@ skipping 125 matching lines @@
 // If auto confirm is enabled then posts a task to proceed with or cancel the
 // install and returns true. Otherwise returns false.
 bool AutoConfirmPrompt(ExtensionInstallPrompt::DoneCallback* callback) {
   switch (extensions::ScopedTestDialogAutoConfirm::GetAutoConfirmValue()) {
     case extensions::ScopedTestDialogAutoConfirm::NONE:
       return false;
     // We use PostTask instead of calling the callback directly here, because in
     // the real implementations it's highly likely the message loop will be
     // pumping a few times before the user clicks accept or cancel.
     case extensions::ScopedTestDialogAutoConfirm::ACCEPT:
-      base::MessageLoop::current()->PostTask(
+      base::ThreadTaskRunnerHandle::Get()->PostTask(
           FROM_HERE, base::Bind(base::ResetAndReturn(callback),
                                 ExtensionInstallPrompt::Result::ACCEPTED));
       return true;
     case extensions::ScopedTestDialogAutoConfirm::CANCEL:
       base::ThreadTaskRunnerHandle::Get()->PostTask(
           FROM_HERE, base::Bind(base::ResetAndReturn(callback),
                                 ExtensionInstallPrompt::Result::USER_CANCELED));
       return true;
   }
 
@@ skipping 659 matching lines @@
 
   if (AutoConfirmPrompt(&done_callback_))
     return;
 
   if (show_dialog_callback_.is_null())
     show_dialog_callback_ = GetDefaultShowDialogCallback();
   base::ResetAndReturn(&show_dialog_callback_)
       .Run(show_params_.get(), base::ResetAndReturn(&done_callback_),
            std::move(prompt_));
 }