Convert TrackedPreferenceValidationDelegate into a mojo interface.

components/user_prefs/tracked/pref_hash_filter.cc

 // Copyright 2013 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.
 
 #include "components/user_prefs/tracked/pref_hash_filter.h"
 
 #include <stdint.h>
 #include <algorithm>
 #include <utility>
 
@@ skipping 36 matching lines @@
   }
 }
 
 }  // namespace
 
 PrefHashFilter::PrefHashFilter(
     std::unique_ptr<PrefHashStore> pref_hash_store,
     StoreContentsPair external_validation_hash_store_pair,
     const std::vector<TrackedPreferenceMetadata>& tracked_preferences,
     const base::Closure& on_reset_on_load,
-    TrackedPreferenceValidationDelegate* delegate,
+    prefs::mojom::TrackedPreferenceValidationDelegate* delegate,
     size_t reporting_ids_count,
     bool report_super_mac_validity)
     : pref_hash_store_(std::move(pref_hash_store)),
       external_validation_hash_store_pair_(
           external_validation_hash_store_pair.first
               ? base::make_optional(
                     std::move(external_validation_hash_store_pair))
               : base::nullopt),
       on_reset_on_load_(on_reset_on_load),
       report_super_mac_validity_(report_super_mac_validity) {
@@ skipping 293 matching lines @@
   // which owns the pointers.
   HashStoreContents* raw_contents = hash_store_contents_copy.get();
   base::DictionaryValue* raw_changed_paths_macs = changed_paths_macs.get();
 
   return std::make_pair(
       base::Bind(&ClearFromExternalStore, base::Unretained(raw_contents),
                  base::Unretained(raw_changed_paths_macs)),
       base::Bind(&FlushToExternalStore, base::Passed(&hash_store_contents_copy),
                  base::Passed(&changed_paths_macs)));
 }