Make kCookiePromptExpanded a profile pref rather than a local state pref so it can be synced.

chrome/browser/browser_prefs.cc

 // Copyright (c) 2010 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/browser_prefs.h"
 
 #include "chrome/browser/autofill/autofill_manager.h"
 #include "chrome/browser/background_contents_service.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/browser.h"
@@ skipping 68 matching lines @@
   MetricsService::RegisterPrefs(local_state);
   SafeBrowsingService::RegisterPrefs(local_state);
   browser_shutdown::RegisterPrefs(local_state);
   chrome_browser_net::RegisterPrefs(local_state);
   PageInfoModel::RegisterPrefs(local_state);
 #if defined(TOOLKIT_VIEWS)
   BrowserView::RegisterBrowserViewPrefs(local_state);
 #endif
   UpgradeDetector::RegisterPrefs(local_state);
   TaskManager::RegisterPrefs(local_state);
-  CookiePromptModalDialog::RegisterPrefs(local_state);
   geolocation::RegisterPrefs(local_state);
   AutoFillManager::RegisterBrowserPrefs(local_state);
 #if defined(OS_CHROMEOS)
   chromeos::UserManager::RegisterPrefs(local_state);
   WizardController::RegisterPrefs(local_state);
   chromeos::LanguageMenuButton::RegisterPrefs(local_state);
 #endif
 }
 
 void RegisterUserPrefs(PrefService* user_prefs) {
@@ skipping 23 matching lines @@
 #if defined(TOOLKIT_VIEWS)
   BrowserActionsContainer::RegisterUserPrefs(user_prefs);
 #elif defined(TOOLKIT_GTK)
   BrowserWindowGtk::RegisterUserPrefs(user_prefs);
   certificate_manager_util::RegisterUserPrefs(user_prefs);
 #endif
 #if defined(OS_CHROMEOS)
   chromeos::Preferences::RegisterUserPrefs(user_prefs);
 #endif
   BackgroundContentsService::RegisterUserPrefs(user_prefs);
+  CookiePromptModalDialog::RegisterUserPrefs(user_prefs);
 }
 
 }  // namespace browser