Add a SigninAllowed policy.

chrome/browser/ui/webui/options/browser_options_handler.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/ui/webui/options/browser_options_handler.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 125 matching lines @@
   cloud_print_connector_ui_enabled_ = true;
 #endif
 }
 
 BrowserOptionsHandler::~BrowserOptionsHandler() {
   ProfileSyncService* sync_service(ProfileSyncServiceFactory::
       GetInstance()->GetForProfile(Profile::FromWebUI(web_ui())));
   if (sync_service)
     sync_service->RemoveObserver(this);
 
+  profile_pref_registrar_.RemoveAll();
   if (default_browser_worker_.get())
     default_browser_worker_->ObserverDestroyed();
   if (template_url_service_)
     template_url_service_->RemoveObserver(this);
   // There may be pending file dialogs, we need to tell them that we've gone
   // away so they don't try and call back to us.
   if (select_folder_dialog_.get())
     select_folder_dialog_->ListenerDestroyed();
 }
 
@@ skipping 417 matching lines @@
 #endif
 }
 
 void BrowserOptionsHandler::OnStateChanged() {
   web_ui()->CallJavascriptFunction("BrowserOptions.updateSyncState",
                                    *GetSyncStateDictionary());
 
   SendProfilesInfo();
 }
 
+void BrowserOptionsHandler::OnSigninAllowedPrefChange() {
+  web_ui()->CallJavascriptFunction("BrowserOptions.updateSyncState",
+                                   *GetSyncStateDictionary());
+
+  SendProfilesInfo();
+}
+
 void BrowserOptionsHandler::PageLoadStarted() {
   page_initialized_ = false;
 }
 
 void BrowserOptionsHandler::InitializeHandler() {
   Profile* profile = Profile::FromWebUI(web_ui());
   PrefService* prefs = profile->GetPrefs();
 
   ProfileSyncService* sync_service(
       ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile));
@@ skipping 47 matching lines @@
       base::Bind(&BrowserOptionsHandler::SetupAutoOpenFileTypes,
                  base::Unretained(this)));
   default_font_size_.Init(
       prefs::kWebKitDefaultFontSize, prefs,
       base::Bind(&BrowserOptionsHandler::SetupFontSizeSelector,
                  base::Unretained(this)));
   default_zoom_level_.Init(
       prefs::kDefaultZoomLevel, prefs,
       base::Bind(&BrowserOptionsHandler::SetupPageZoomSelector,
                  base::Unretained(this)));
+  profile_pref_registrar_.Init(prefs);
+  profile_pref_registrar_.Add(prefs::kSigninAllowed,
+                   base::Bind(&BrowserOptionsHandler::OnSigninAllowedPrefChange,
+                              base::Unretained(this)));
 #if !defined(OS_CHROMEOS)
-  proxy_prefs_.Init(prefs);
-  proxy_prefs_.Add(prefs::kProxy,
+  profile_pref_registrar_.Add(prefs::kProxy,
                    base::Bind(&BrowserOptionsHandler::SetupProxySettingsSection,
                               base::Unretained(this)));
 #endif  // !defined(OS_CHROMEOS)
 }
 
 void BrowserOptionsHandler::InitializePage() {
   page_initialized_ = true;
   OnTemplateURLServiceChanged();
   ObserveThemeChanged();
   OnStateChanged();
@@ skipping 391 matching lines @@
     web_ui()->CallJavascriptFunction("BrowserOptions.updateAccountPicture",
                                      email_value);
   }
 }
 #endif
 
 scoped_ptr<DictionaryValue> BrowserOptionsHandler::GetSyncStateDictionary() {
   scoped_ptr<DictionaryValue> sync_status(new DictionaryValue);
   ProfileSyncService* service(ProfileSyncServiceFactory::
       GetInstance()->GetForProfile(Profile::FromWebUI(web_ui())));
+  SigninManager* signin = SigninManagerFactory::GetForProfile(
+      Profile::FromWebUI(web_ui()));
+  DCHECK(signin);

[Andrew T Wilson (Slow), 2013/02/07 10:08:11]

I believe signin can be NULL for chromeos guest profiles. If you sync with ToT
you'll see a fix I landed for this case.

[Adrian Kuegel, 2013/02/07 11:09:21]

I merged it to ToT. Hopefully correctly :-)

+  sync_status->SetBoolean("signinAllowed", signin->IsSigninAllowed());
   sync_status->SetBoolean("syncSystemEnabled", !!service);
   if (!service)
     return sync_status.Pass();
 
   sync_status->SetBoolean("setupCompleted",
                           service->HasSyncSetupCompleted());
   sync_status->SetBoolean("setupInProgress", service->FirstSetupInProgress());
 
   string16 status_label;
   string16 link_label;
-  SigninManager* signin = SigninManagerFactory::GetForProfile(
-      Profile::FromWebUI(web_ui()));
 
   bool status_has_error = sync_ui_util::GetStatusLabels(
       service, *signin, sync_ui_util::WITH_HTML, &status_label, &link_label) ==
           sync_ui_util::SYNC_ERROR;
   sync_status->SetString("statusText", status_label);
   sync_status->SetString("actionLinkText", link_label);
   sync_status->SetBoolean("hasError", status_has_error);
 
   sync_status->SetBoolean("managed", service->IsManaged());
   sync_status->SetBoolean("signedIn",
@@ skipping 313 matching lines @@
 void BrowserOptionsHandler::SetupProxySettingsSection() {
 #if !defined(OS_CHROMEOS)
   // Disable the button if proxy settings are managed by a sysadmin or
   // overridden by an extension.
   PrefService* pref_service = Profile::FromWebUI(web_ui())->GetPrefs();
   const PrefService::Preference* proxy_config =
       pref_service->FindPreference(prefs::kProxy);
   bool is_extension_controlled = (proxy_config &&
                                   proxy_config->IsExtensionControlled());
 
-  base::FundamentalValue disabled(proxy_prefs_.IsManaged() ||
+  base::FundamentalValue disabled(profile_pref_registrar_.IsManaged() ||
                                   is_extension_controlled);
   base::FundamentalValue extension_controlled(is_extension_controlled);
   web_ui()->CallJavascriptFunction("BrowserOptions.setupProxySettingsSection",
                                    disabled, extension_controlled);
 
 #endif  // !defined(OS_CHROMEOS)
 }
 
 }  // namespace options