Make sure GetAuthenticatedAccountId() returns a canonicalized id.

chrome/browser/sync/profile_sync_service_android.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.
 
 #include "chrome/browser/sync/profile_sync_service_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/i18n/time_formatting.h"
@@ skipping 263 matching lines @@
       base::TimeFormatShortDate(passphrase_time);
   return base::android::ConvertUTF16ToJavaString(env,
       l10n_util::GetStringFUTF16(IDS_SYNC_ENTER_PASSPHRASE_BODY_WITH_DATE,
         passphrase_time_str));
 }
 
 ScopedJavaLocalRef<jstring>
     ProfileSyncServiceAndroid::GetCurrentSignedInAccountText(
         JNIEnv* env, jobject) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  const std::string& sync_username =
+  std::string sync_username =
       SigninManagerFactory::GetForProfile(profile_)->GetAuthenticatedUsername();
   return base::android::ConvertUTF16ToJavaString(env,
       l10n_util::GetStringFUTF16(
           IDS_SYNC_ACCOUNT_SYNCING_TO_USER,
           base::ASCIIToUTF16(sync_username)));
 }
 
 ScopedJavaLocalRef<jstring>
     ProfileSyncServiceAndroid::GetSyncEnterCustomPassphraseBodyText(
         JNIEnv* env, jobject) {
@@ skipping 181 matching lines @@
   ProfileSyncServiceAndroid* profile_sync_service_android =
       new ProfileSyncServiceAndroid(env, obj);
   profile_sync_service_android->Init();
   return reinterpret_cast<intptr_t>(profile_sync_service_android);
 }
 
 // static
 bool ProfileSyncServiceAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }