Integrate registry_hash_store_contents with the rest of tracked prefs.

components/user_prefs/tracked/pref_hash_store_transaction.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_TRANSACTION_H_
 #define COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_TRANSACTION_H_
 
 #include <string>
 #include <vector>
 
+enum class HashStoreContentsType : int32_t;
+
 namespace base {
 class DictionaryValue;
 class Value;
 }  // namespace base
 
 // Used to perform a series of checks/transformations on a PrefHashStore.
 class PrefHashStoreTransaction {
  public:
   enum ValueState {
     // The preference value corresponds to its stored hash.
@@ skipping 13 matching lines @@
     // happens when all hashes are already properly seeded and a newly
     // tracked value needs to be seeded).
     TRUSTED_UNKNOWN_VALUE,
     // NULL values are inherently trusted.
     TRUSTED_NULL_VALUE,
   };
 
   // Finalizes any remaining work after the transaction has been performed.
   virtual ~PrefHashStoreTransaction() {}
 
+  // Returns the type of the store contained in this transaction.
+  virtual std::string GetStoreUMASuffix() const = 0;
+
   // Checks |initial_value| against the existing stored value hash.
   virtual ValueState CheckValue(const std::string& path,
                                 const base::Value* initial_value) const = 0;
 
   // Stores a hash of the current |value| of the preference at |path|.
   virtual void StoreHash(const std::string& path, const base::Value* value) = 0;
 
   // Checks |initial_value| against the existing stored hashes for the split
   // preference at |path|. |initial_split_value| being an empty dictionary or
   // NULL is equivalent. |invalid_keys| must initially be empty. |invalid_keys|
@@ skipping 31 matching lines @@
   // 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  // COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_TRANSACTION_H_