Make super MAC optional.

chrome/browser/prefs/pref_hash_store_impl.h

Index: chrome/browser/prefs/pref_hash_store_impl.h
diff --git a/chrome/browser/prefs/pref_hash_store_impl.h b/chrome/browser/prefs/pref_hash_store_impl.h
index f334f68694f270649c52f9b6bc98f8142662b440..38fd19f96c07d1218f9fb472fbcd0167e2c06061 100644
--- a/chrome/browser/prefs/pref_hash_store_impl.h
+++ b/chrome/browser/prefs/pref_hash_store_impl.h
@@ -42,7 +42,8 @@ class PrefHashStoreImpl : public PrefHashStore {
   // previously stored hashes in |contents|.
   PrefHashStoreImpl(const std::string& seed,
                     const std::string& device_id,
-                    scoped_ptr<HashStoreContents> contents);
+                    scoped_ptr<HashStoreContents> contents,
+                    bool use_super_mac);
 
   virtual ~PrefHashStoreImpl();
 
@@ -60,6 +61,7 @@ class PrefHashStoreImpl : public PrefHashStore {
   const PrefHashCalculator pref_hash_calculator_;
   scoped_ptr<HashStoreContents> contents_;
   const bool initial_hashes_dictionary_trusted_;
+  bool use_super_mac_;
 
   // True if hashes have been modified since the last call to
   // CommitPendingWriteIfRequired().