Temporary whitelist several cases of disk I/O on the UI threads in cros.

chrome/browser/chromeos/login/login_utils.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/chromeos/login/login_utils.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/scoped_ptr.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/lock.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/cros/login_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/login/background_view.h"
 #include "chrome/browser/chromeos/login/cookie_fetcher.h"
@@ skipping 186 matching lines @@
 
   // Now get the new profile.
   FilePath user_data_dir;
   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
   ProfileManager* profile_manager = g_browser_process->profile_manager();
 
   // Switch log file as soon as possible.
   logging::RedirectChromeLogging(*(CommandLine::ForCurrentProcess()));
   btl->AddLoginTimeMarker("LoggingRedirected", false);
 
-  // The default profile will have been changed because the ProfileManager
-  // will process the notification that the UserManager sends out.
-  Profile* profile = profile_manager->GetDefaultProfile(user_data_dir);
+  Profile* profile = NULL;
+  {
+    // Loading user profile causes us to do blocking IO on UI thread.
+    // Temporarily allow it until we fix http://crosbug.com/11104
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
+    // The default profile will have been changed because the ProfileManager
+    // will process the notification that the UserManager sends out.
+    profile = profile_manager->GetDefaultProfile(user_data_dir);
+  }
   btl->AddLoginTimeMarker("UserProfileGotten", false);
 
   // Change the proxy configuration service of the default request context to
   // use the preference configuration from the logged-in profile. This ensures
   // that requests done through the default context use the proxy configuration
   // provided by configuration policy.
   //
   // Note: Many of the clients of the default request context should probably be
   // fixed to use the request context of the profile they are associated with.
   // This includes preconnect, autofill, metrics service to only name a few;
@@ skipping 342 matching lines @@
   BrowserInit browser_init;
   int return_code;
   browser_init.LaunchBrowser(*CommandLine::ForCurrentProcess(),
                              profile,
                              FilePath(),
                              true,
                              &return_code);
 }
 
 }  // namespace chromeos