Move preference MACs to the protected preference stores.

chrome/browser/prefs/tracked/tracked_preferences_migration.h

Index: chrome/browser/prefs/tracked/tracked_preferences_migration.h
diff --git a/chrome/browser/prefs/tracked/tracked_preferences_migration.h b/chrome/browser/prefs/tracked/tracked_preferences_migration.h
index 348f844cc00a7bb0ee62c5b5ac80367a830d3fe4..792a655a33c1368235fe92252f4670867e31ad59 100644
--- a/chrome/browser/prefs/tracked/tracked_preferences_migration.h
+++ b/chrome/browser/prefs/tracked/tracked_preferences_migration.h
@@ -9,6 +9,9 @@
 #include <string>
 
 #include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/prefs/pref_hash_store.h"
+#include "chrome/browser/prefs/tracked/hash_store_contents.h"
 
 class InterceptablePrefFilter;
 
@@ -31,6 +34,9 @@ void SetupTrackedPreferencesMigration(
         register_on_successful_unprotected_store_write_callback,
     const base::Callback<void(const base::Closure&)>&
         register_on_successful_protected_store_write_callback,
+    scoped_ptr<PrefHashStore> unprotected_pref_hash_store,
+    scoped_ptr<PrefHashStore> protected_pref_hash_store,
+    scoped_ptr<HashStoreContents> legacy_pref_hash_store,
     InterceptablePrefFilter* unprotected_pref_filter,
     InterceptablePrefFilter* protected_pref_filter);