sync: remove GetAuthenticatedUsername from ProfileSyncService/SyncBackendHost.

chrome/browser/sync/profile_sync_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/sync/profile_sync_service.h"
 
 #include <algorithm>
 #include <cstddef>
 #include <map>
 #include <set>
@@ skipping 1039 matching lines @@
     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_NEVER);
 
   base::TimeDelta last_synced = base::Time::Now() - last_synced_time_;
 
   if (last_synced < base::TimeDelta::FromMinutes(1))
     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_JUST_NOW);
 
   return TimeFormat::TimeElapsed(last_synced);
 }
 
-string16 ProfileSyncService::GetAuthenticatedUsername() const {
-  if (backend_.get() && backend_initialized_)
-    return backend_->GetAuthenticatedUsername();
-  else
-    return string16();
-}
-
 void ProfileSyncService::OnUserSubmittedAuth(
     const std::string& username, const std::string& password,
     const std::string& captcha, const std::string& access_code) {
   last_attempted_user_email_ = username;
   is_auth_in_progress_ = true;
   NotifyObservers();
 
   auth_start_time_ = base::TimeTicks::Now();
 
   if (!signin_->IsInitialized()) {
@@ skipping 480 matching lines @@
              << "Unrecoverable error.";
   } else {
     DVLOG(0) << "ConfigureDataTypeManager not invoked because backend is not "
              << "initialized";
   }
 }
 
 const FailedDatatypesHandler& ProfileSyncService::failed_datatypes_handler() {
   return failed_datatypes_handler_;
 }