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..ed3a355cc18241c7b82f655e24d5804a889fdbc6 100644
--- a/chrome/browser/prefs/pref_hash_store_transaction.h
+++ b/chrome/browser/prefs/pref_hash_store_transaction.h
@@ -67,6 +67,33 @@ class PrefHashStoreTransaction {
   virtual void StoreSplitHash(
       const std::string& path,
       const base::DictionaryValue* split_value) = 0;
+
+  // Indicates whether the store contains a hash for the preference at |path|.
+  virtual bool HasHash(const std::string& path) const = 0;
+
+  // Sets the hash for the preference at |path|. If |hash| is NULL any stored
+  // hash is cleared. Otherwise:
+  // * If |path| is a split preference |hash| should be a DictionaryValue whose
+  // keys are keys in the split preference and whose values are MACs of the
+  // corresponding values in the split preference.
+  // * If |path| is an atomic preference |hash| should be a StringValue
+  // containing a MAC of the preference value.
+  // |hash| should originate from a PrefHashStore sharing the same MAC
+  // parameters as this transaction's store.
+  // The (in)validity of the super MAC will be maintained by this call.
+  virtual void ImportHash(const std::string& path, const base::Value* hash) = 0;
+
+  // Removes the hash stored at |path|. The (in)validity of the super MAC will
+  // be maintained by this call.
+  virtual void ClearHash(const std::string& path) = 0;
+
+  // Indicates whether the super MAC was successfully verified at the beginning
+  // of this transaction.
+  virtual bool IsSuperMACValid() const = 0;
+
+  // Forces a valid super MAC to be stored when this transaction terminates.
+  // 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_