Remove raw base::DictionaryValue::Set

services/preferences/tracked/tracked_preferences_migration.cc

 // 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.
 
 #include "services/preferences/tracked/tracked_preferences_migration.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "services/preferences/tracked/dictionary_hash_store_contents.h"
 #include "services/preferences/tracked/hash_store_contents.h"
 #include "services/preferences/tracked/interceptable_pref_filter.h"
 #include "services/preferences/tracked/pref_hash_store.h"
 #include "services/preferences/tracked/pref_hash_store_transaction.h"
 
 namespace {
@@ skipping 135 matching lines @@
       // Whether this value ends up being copied below or was left behind by a
       // previous incomplete migration, it should be cleaned up.
       *old_store_needs_cleanup = true;
 
       if (!new_store->Get(pref_name, NULL)) {
         // Copy the value from |old_store| to |new_store| rather than moving it
         // to avoid data loss should |old_store| be flushed to disk without
         // |new_store| having equivalently been successfully flushed to disk
         // (e.g., on crash or in cases where |new_store| is read-only following
         // a read error on startup).
-        new_store->Set(pref_name, value_in_old_store->DeepCopy());
+        new_store->Set(pref_name,
+                       base::MakeUnique<base::Value>(*value_in_old_store));
         migrated_value = true;
         *new_store_altered = true;
       }
     }
 
     if (destination_hash_missing || migrated_value) {
       const base::Value* old_hash = NULL;
       if (old_hash_store_contents)
         old_hash_store_contents->Get(pref_name, &old_hash);
       if (old_hash) {
@@ skipping 146 matching lines @@
   scoped_refptr<TrackedPreferencesMigrator> prefs_migrator(
       new TrackedPreferencesMigrator(
           unprotected_pref_names, protected_pref_names,
           unprotected_store_cleaner, protected_store_cleaner,
           register_on_successful_unprotected_store_write_callback,
           register_on_successful_protected_store_write_callback,
           std::move(unprotected_pref_hash_store),
           std::move(protected_pref_hash_store), unprotected_pref_filter,
           protected_pref_filter));
 }