[sync] Automatic bootstrapping of Sync on Win 8 from cached credentials

chrome/browser/sync/sync_prefs.h

Index: chrome/browser/sync/sync_prefs.h
diff --git a/chrome/browser/sync/sync_prefs.h b/chrome/browser/sync/sync_prefs.h
index 8515adba73d59661d0b6b77b3fc8c76125781a6c..b2f4e81f827151aa6451aa4df9fbe7960ed92ca5 100644
--- a/chrome/browser/sync/sync_prefs.h
+++ b/chrome/browser/sync/sync_prefs.h
@@ -98,6 +98,9 @@ class SyncPrefs : NON_EXPORTED_BASE(public base::NonThreadSafe),
   std::string GetEncryptionBootstrapToken() const;
   void SetEncryptionBootstrapToken(const std::string& token);
 
+  // Maps |data_type| to its corresponding preference name.
+  static const char* GetPrefNameForDataType(syncer::ModelType data_type);
+
 #if defined(OS_CHROMEOS)
   // Use this spare bootstrap token only when setting up sync for the first
   // time.