Add scoped_allowio for WebResourceServiceUtil::CanShowPromo until we can eval...

chrome/browser/web_resource/web_resource_service.cc

 // Copyright (c) 2011 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/web_resource/web_resource_service.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/string_util.h"
 #include "base/string_number_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/sync_ui_util.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 528 matching lines @@
   PrefService* prefs = profile->GetPrefs();
   if (prefs->HasPrefPath(prefs::kNTPPromoClosed))
     promo_closed = prefs->GetBoolean(prefs::kNTPPromoClosed);
 
   // Only show if not synced.
   bool is_synced =
       (profile->HasProfileSyncService() &&
           sync_ui_util::GetStatus(
               profile->GetProfileSyncService()) == sync_ui_util::SYNCED);
 
+  // GetVersionStringModifier hits the registry. See http://crbug.com/70898.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   const std::string channel = platform_util::GetVersionStringModifier();
   bool is_promo_build = false;
   if (prefs->HasPrefPath(prefs::kNTPPromoBuild)) {
     int builds_allowed = prefs->GetInteger(prefs::kNTPPromoBuild);
     if (channel == "dev") {
       is_promo_build = (DEV_BUILD & builds_allowed) != 0;
     } else if (channel == "beta") {
       is_promo_build = (BETA_BUILD & builds_allowed) != 0;
     } else if (channel == "stable") {
       is_promo_build = (STABLE_BUILD & builds_allowed) != 0;
     } else {
       is_promo_build = true;
     }
   }
 
   return !promo_closed && !is_synced && is_promo_build;
 }
 
 }  // namespace WebResourceService