Clean up pref change notification handling.

chrome/browser/prefs/testing_pref_store.cc

+// Copyright (c) 2010 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/testing_pref_store.h"
+
+#include "base/values.h"
+
+TestingPrefStore::TestingPrefStore()
+    : prefs_(new DictionaryValue()),
+      read_only_(true),
+      prefs_written_(false),
+      init_complete_(false) { }
+
+PrefStore::PrefReadError TestingPrefStore::ReadPrefs() {
+  prefs_.reset(new DictionaryValue());
+  return PrefStore::PREF_READ_ERROR_NONE;
+}
+
+bool TestingPrefStore::WritePrefs() {
+  prefs_written_ = true;
+  return prefs_written_;
+}
+
+void TestingPrefStore::NotifyPrefValueChanged(const std::string& key) {
+  PrefStoreBase::NotifyPrefValueChanged(key);
+}
+
+void TestingPrefStore::NotifyInitializationCompleted() {
+  PrefStoreBase::NotifyInitializationCompleted();
+}
+
+void TestingPrefStore::SetInitializationCompleted() {
+  init_complete_ = true;
+  NotifyInitializationCompleted();
+}