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/memory/scoped_ptr.h"
 #include "base/values.h"
 
 OverlayPersistentPrefStore::OverlayPersistentPrefStore(
     PersistentPrefStore* underlay)
     : underlay_(underlay) {
   underlay_->AddObserver(this);
 }
 OverlayPersistentPrefStore::~OverlayPersistentPrefStore() {
   underlay_->RemoveObserver(this);
 }
@@ skipping 56 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(true);
   return PersistentPrefStore::PREF_READ_ERROR_NONE;
 }
 
+void OverlayPersistentPrefStore::ReadPrefsAsync(
+    ReadErrorDelegate* error_delegate_raw) {
+  scoped_ptr<ReadErrorDelegate> error_delegate(error_delegate_raw);
+  // We do not read intentionally.
+  OnInitializationCompleted(true);
+}
+
 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() {
+void OverlayPersistentPrefStore::OnInitializationCompleted(bool succeeded) {
   FOR_EACH_OBSERVER(PrefStore::Observer, observers_,
-                    OnInitializationCompleted());
+                    OnInitializationCompleted(succeeded));
 }