When a user logs into sync, the appropriate cookies are retrieved so that

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 4299 matching lines @@
       </message>
       <message name="IDS_FLAGS_INDEXEDDB_USE_LEVELDB_DESCRIPTION" desc="Description for the flag to use the LevelDB back-end for IndexedDB">
         Enable the experimental LevelDB back-end for IndexedDB.
       </message>
       <message name="IDS_FLAGS_PRELOAD_INSTANT_SEARCH_NAME" desc="Title for the flag to preload Instant search">
         Preload Instant Search
       </message>
       <message name="IDS_FLAGS_PRELOAD_INSTANT_SEARCH_DESCRIPTION" desc="Description for the flag to preload Instant search">
         Preload the default search engine for Instant.
       </message>
+      <message name="IDS_FLAGS_AUTO_LOGIN_NAME" desc="title for the flag to pre- and auto-login the user">
+        Disable pre- and auto-login
+      </message>
+      <message name="IDS_FLAGS_AUTO_LOGIN_DESCRIPTION" desc="Description for the flag to pre- and auto-login the user">
+        Disable pre-login to services when sync is enabled.  Also disable infobar on login pages which help automate the login process.
+        Pre- and auto-login are always disabled if sync is disabled.
+      </message>
       <message name="IDS_FLAGS_SHOW_AUTOFILL_TYPE_PREDICTIONS_NAME" desc="Title for the flag to show Autofill field type predictions for all forms">
         Show Autofill predictions
       </message>
       <message name="IDS_FLAGS_SHOW_AUTOFILL_TYPE_PREDICTIONS_DESCRIPTION" desc="Description for the flag to show Autofill field type predictions for all forms">
         Annotates web forms with Autofill field type predictions as placeholder text.
       </message>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">
         Crashes
@@ skipping 8392 matching lines @@
     </includes>
     <structures fallback_to_english="true">
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
 
   </release>
 </grit>