Leftover cleanups from https://codereview.chromium.org/324493002 .

base/prefs/value_map_pref_store.cc

 // Copyright (c) 2012 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 "base/prefs/value_map_pref_store.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "base/values.h"
@@ skipping 29 matching lines @@
 
 bool ValueMapPrefStore::GetMutableValue(const std::string& key,
                                         base::Value** value) {
   return prefs_.GetValue(key, value);
 }
 
 void ValueMapPrefStore::ReportValueChanged(const std::string& key) {
   FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
 }
 
+void ValueMapPrefStore::SetValueSilently(const std::string& key,
+                                         base::Value* value) {
+  prefs_.SetValue(key, value);
+}
+
 ValueMapPrefStore::~ValueMapPrefStore() {}
 
 void ValueMapPrefStore::NotifyInitializationCompleted() {
   FOR_EACH_OBSERVER(Observer, observers_, OnInitializationCompleted(true));
 }