Adds async interface method to PersistentPrefStore.

chrome/browser/prefs/overlay_persistent_pref_store.cc

 // Copyright (c) 2011 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 "chrome/browser/prefs/overlay_persistent_pref_store.h"
 
 #include "base/values.h"
 
 OverlayPersistentPrefStore::OverlayPersistentPrefStore(
     PersistentPrefStore* underlay)
@@ skipping 62 matching lines @@
   if (overlay_.RemoveValue(key))
     FOR_EACH_OBSERVER(PrefStore::Observer, observers_, OnPrefValueChanged(key));
 }
 
 bool OverlayPersistentPrefStore::ReadOnly() const {
   return false;
 }
 
 PersistentPrefStore::PrefReadError OverlayPersistentPrefStore::ReadPrefs() {
   // We do not read intentionally.
+  OnInitializationCompleted();
   return PersistentPrefStore::PREF_READ_ERROR_NONE;
 }
 
+void OverlayPersistentPrefStore::ReadPrefsAsync() {
+  // We do not read intentionally.
+  OnInitializationCompleted();
+}
+
+void OverlayPersistentPrefStore::GetErrors(PrefReadError* error,
+                                           bool* is_fatal) {
+  (*error) = PersistentPrefStore::PREF_READ_ERROR_NONE;
+  (*is_fatal) = false;
+}
+
 bool OverlayPersistentPrefStore::WritePrefs() {
   // We do not write intentionally.
   return true;
 }
 
 void OverlayPersistentPrefStore::ScheduleWritePrefs() {
   // We do not write intentionally.
 }
 
 void OverlayPersistentPrefStore::CommitPendingWrite() {
   // We do not write intentionally.
 }
 
 void OverlayPersistentPrefStore::ReportValueChanged(const std::string& key) {
   FOR_EACH_OBSERVER(PrefStore::Observer, observers_, OnPrefValueChanged(key));
 }
 
 void OverlayPersistentPrefStore::OnPrefValueChanged(const std::string& key) {
   if (!overlay_.GetValue(key, NULL))
     FOR_EACH_OBSERVER(PrefStore::Observer, observers_, OnPrefValueChanged(key));
 }
 
 void OverlayPersistentPrefStore::OnInitializationCompleted() {
   FOR_EACH_OBSERVER(PrefStore::Observer, observers_,
                     OnInitializationCompleted());
 }