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

chrome/browser/prefs/pref_value_store.cc

Index: chrome/browser/prefs/pref_value_store.cc
===================================================================
--- chrome/browser/prefs/pref_value_store.cc	(revision 118120)
+++ chrome/browser/prefs/pref_value_store.cc	(working copy)
@@ -1,4 +1,4 @@
-// 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.
 
@@ -185,6 +185,10 @@
          effective_store == INVALID_STORE;
 }
 
+void PrefValueStore::UpdateCommandLinePrefStore(PrefStore* command_line_prefs) {
+  InitPrefStore(COMMAND_LINE_STORE, command_line_prefs);
+}
+
 bool PrefValueStore::PrefValueInStore(
     const char* name,
     PrefValueStore::PrefStoreType store) const {