extensions: Use base::RunLoop instead of deprecated MessageLoop methods.

chrome/browser/extensions/startup_helper.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/startup_helper.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 275 matching lines @@
 bool StartupHelper::InstallFromWebstore(const CommandLine& cmd_line,
                                         Profile* profile) {
   std::string id = cmd_line.GetSwitchValueASCII(switches::kInstallFromWebstore);
   if (!Extension::IdIsValid(id)) {
     LOG(ERROR) << "Invalid id for " << switches::kInstallFromWebstore
                << " : '" << id << "'";
     return false;
   }
 
   AppInstallHelper helper;
-  helper.BeginInstall(
-      profile, id, true, base::MessageLoop::QuitWhenIdleClosure());
+  base::RunLoop run_loop;
+  helper.BeginInstall(profile, id, true, run_loop.QuitClosure());
+  run_loop.Run();
 
-  base::MessageLoop::current()->Run();
   if (!helper.success())
     LOG(ERROR) << "InstallFromWebstore failed with error: " << helper.error();
   return helper.success();
 }
 
 void StartupHelper::LimitedInstallFromWebstore(
     const CommandLine& cmd_line,
     Profile* profile,
     base::Callback<void()> done_callback) {
   std::string id = WebStoreIdFromLimitedInstallCmdLine(cmd_line);
@@ skipping 21 matching lines @@
   }
   return id;
 }
 
 StartupHelper::~StartupHelper() {
   if (pack_job_.get())
     pack_job_->ClearClient();
 }
 
 }  // namespace extensions