Reinitialize LocalState's CommandLinePrefStore after about_flags updates the command line.

chrome/common/json_pref_store.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "chrome/common/json_pref_store.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 150 matching lines @@
 }
 
 void JsonPrefStore::AddObserver(PrefStore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void JsonPrefStore::RemoveObserver(PrefStore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
+size_t JsonPrefStore::NumberOfObservers() const {
+  return observers_.size();
+}
+
 bool JsonPrefStore::IsInitializationComplete() const {
   return initialized_;
 }
 
 PrefStore::ReadResult JsonPrefStore::GetMutableValue(const std::string& key,
                                                      Value** result) {
   return prefs_->Get(key, result) ? READ_OK : READ_NO_VALUE;
 }
 
 void JsonPrefStore::SetValue(const std::string& key, Value* value) {
@@ skipping 112 matching lines @@
 }
 
 bool JsonPrefStore::SerializeData(std::string* output) {
   // TODO(tc): Do we want to prune webkit preferences that match the default
   // value?
   JSONStringValueSerializer serializer(output);
   serializer.set_pretty_print(true);
   scoped_ptr<DictionaryValue> copy(prefs_->DeepCopyWithoutEmptyChildren());
   return serializer.Serialize(*(copy.get()));
 }