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

chrome/browser/prefs/testing_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/browser/prefs/testing_pref_store.h"
 
 #include "base/values.h"
 
 TestingPrefStore::TestingPrefStore()
     : read_only_(true),
       prefs_written_(false),
@@ skipping 12 matching lines @@
 }
 
 void TestingPrefStore::AddObserver(PrefStore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void TestingPrefStore::RemoveObserver(PrefStore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
+size_t TestingPrefStore::NumberOfObservers() const {
+  return observers_.size();
+}
+
 bool TestingPrefStore::IsInitializationComplete() const {
   return init_complete_;
 }
 
 void TestingPrefStore::SetValue(const std::string& key, Value* value) {
   if (prefs_.SetValue(key, value))
     NotifyPrefValueChanged(key);
 }
 
 void TestingPrefStore::SetValueSilently(const std::string& key, Value* value) {
@@ skipping 72 matching lines @@
   const Value* stored_value;
   if (!prefs_.GetValue(key, &stored_value) || !stored_value)
     return false;
 
   return stored_value->GetAsBoolean(value);
 }
 
 void TestingPrefStore::set_read_only(bool read_only) {
   read_only_ = read_only;
 }