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

chrome/browser/policy/configuration_policy_pref_store.cc

 // 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/policy/configuration_policy_pref_store.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 47 matching lines @@
 
 void ConfigurationPolicyPrefStore::AddObserver(PrefStore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void ConfigurationPolicyPrefStore::RemoveObserver(
     PrefStore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
+size_t ConfigurationPolicyPrefStore::NumberOfObservers() const {
+  return observers_.size();
+}
+
 bool ConfigurationPolicyPrefStore::IsInitializationComplete() const {
   return initialization_complete_;
 }
 
 PrefStore::ReadResult
 ConfigurationPolicyPrefStore::GetValue(const std::string& key,
                                        const Value** value) const {
   const Value* stored_value = NULL;
   if (!prefs_.get() || !prefs_->GetValue(key, &stored_value))
     return PrefStore::READ_NO_VALUE;
@@ skipping 85 matching lines @@
   // issue during startup.
   BrowserThread::PostTask(BrowserThread::UI,
                           FROM_HERE,
                           base::Bind(&LogErrors,
                                      base::Owned(errors.release())));
 
   return prefs.release();
 }
 
 }  // namespace policy