Update TaskTraits in password_manager_util_win.cc.

chrome/browser/password_manager/password_manager_util_win.cc

 // Copyright 2013 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.
 
 // windows.h must be first otherwise Win8 SDK breaks.
 #include <windows.h>
 #include <LM.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <wincred.h>
@@ skipping 189 matching lines @@
 void GetOsPasswordStatus() {
   // Preferences can be accessed on the UI thread only.
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   PrefService* local_state = g_browser_process->local_state();
   std::unique_ptr<PasswordCheckPrefs> prefs(new PasswordCheckPrefs);
   prefs->Read(local_state);
   std::unique_ptr<OsPasswordStatus> status(
       new OsPasswordStatus(PASSWORD_STATUS_UNKNOWN));
   PasswordCheckPrefs* prefs_weak = prefs.get();
   OsPasswordStatus* status_weak = status.get();
+  // This task calls ::LogonUser(), hence MayBlock().
   base::PostTaskWithTraitsAndReply(
       FROM_HERE, base::TaskTraits()
                      .WithPriority(base::TaskPriority::BACKGROUND)
-                     .WithWait(),
+                     .MayBlock(),
       base::Bind(&GetOsPasswordStatusInternal, prefs_weak, status_weak),
       base::Bind(&ReplyOsPasswordStatus, base::Passed(&prefs),
                  base::Passed(&status)));
 }
 
 }  // namespace
 
 void DelayReportOsPassword() {
   content::BrowserThread::PostDelayedTask(content::BrowserThread::UI, FROM_HERE,
                                           base::Bind(&GetOsPasswordStatus),
@@ skipping 93 matching lines @@
         }
       }
       SecureZeroMemory(password, sizeof(password));
     }
   } while (credErr == NO_ERROR &&
            (retval == false && tries < kMaxPasswordRetries));
   return retval;
 }
 
 }  // namespace password_manager_util_win