Move preference MACs to the protected preference stores.

chrome/browser/prefs/pref_hash_store_transaction.h

Index: chrome/browser/prefs/pref_hash_store_transaction.h
diff --git a/chrome/browser/prefs/pref_hash_store_transaction.h b/chrome/browser/prefs/pref_hash_store_transaction.h
index 10022aae836311844aca1cd31ea2769453f5ab4d..bb6c9f768effd9bac41df00b18e9d53ee09c5b94 100644
--- a/chrome/browser/prefs/pref_hash_store_transaction.h
+++ b/chrome/browser/prefs/pref_hash_store_transaction.h
@@ -67,6 +67,14 @@ class PrefHashStoreTransaction {
   virtual void StoreSplitHash(
       const std::string& path,
       const base::DictionaryValue* split_value) = 0;
+
+  virtual bool HasHash(const std::string& path) const = 0;
+  virtual void ImportHash(const std::string& path, const base::Value* hash) = 0;
+  virtual void ClearHash(const std::string& path) = 0;
+
+  // Forces the super MAC to be updated. Returns true if this results in a
+  // change to the store contents.
+  virtual bool StampSuperMac() = 0;
 };
 
 #endif  // CHROME_BROWSER_PREFS_PREF_HASH_STORE_TRANSACTION_H_