Add synchronous callback support to important_file_writer.cc

components/prefs/json_pref_store.cc

Index: components/prefs/json_pref_store.cc
diff --git a/components/prefs/json_pref_store.cc b/components/prefs/json_pref_store.cc
index 779c2009730366aba4d8fae689d340b2fb81ad71..9dd313438ca3a7affa50ac5ec9504b6cc621d746 100644
--- a/components/prefs/json_pref_store.cc
+++ b/components/prefs/json_pref_store.cc
@@ -323,11 +323,11 @@ void JsonPrefStore::ReportValueChanged(const std::string& key, uint32_t flags) {
   ScheduleWrite(flags);
 }
 
-void JsonPrefStore::RegisterOnNextSuccessfulWriteCallback(
-    const base::Closure& on_next_successful_write) {
+void JsonPrefStore::RegisterOnNextSuccessfulWriteReply(
+    const base::Closure& on_next_successful_write_reply) {
   DCHECK(CalledOnValidThread());
 
-  writer_.RegisterOnNextSuccessfulWriteCallback(on_next_successful_write);
+  writer_.RegisterOnNextSuccessfulWriteReply(on_next_successful_write_reply);
 }
 
 void JsonPrefStore::ClearMutableValues() {