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

chrome/browser/prefs/overlay_user_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/prefs/overlay_user_pref_store.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 
 OverlayUserPrefStore::OverlayUserPrefStore(
@@ skipping 11 matching lines @@
 }
 
 void OverlayUserPrefStore::AddObserver(PrefStore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void OverlayUserPrefStore::RemoveObserver(PrefStore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
+size_t OverlayUserPrefStore::NumberOfObservers() const {
+  return observers_.size();
+}
+
 bool OverlayUserPrefStore::IsInitializationComplete() const {
   return underlay_->IsInitializationComplete();
 }
 
 PrefStore::ReadResult OverlayUserPrefStore::GetValue(
     const std::string& key,
     const Value** result) const {
   // If the |key| shall NOT be stored in the overlay store, there must not
   // be an entry.
   DCHECK(ShallBeStoredInOverlay(key) || !overlay_.GetValue(key, NULL));
@@ skipping 122 matching lines @@
   NamesMap::const_iterator i =
       overlay_to_underlay_names_map_.find(overlay_key);
   return i != overlay_to_underlay_names_map_.end() ? i->second : overlay_key;
 }
 
 bool OverlayUserPrefStore::ShallBeStoredInOverlay(
     const std::string& key) const {
   return overlay_to_underlay_names_map_.find(key) !=
       overlay_to_underlay_names_map_.end();
 }