Remove BrowserSignin, as it's not used anywhere.

chrome/browser/ui/webui/options/personal_options_handler.cc

 // Copyright (c) 2011 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/personal_options_handler.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 308 matching lines @@
                                   *visible);
 
   // Set profile creation text and button if multi-profiles switch is on.
   visible.reset(Value::CreateBooleanValue(multiprofile_));
   web_ui_->CallJavascriptFunction("PersonalOptions.setProfilesSectionVisible",
                                   *visible);
   if (multiprofile_)
     SendProfilesInfo();
 }
 
-void PersonalOptionsHandler::OnLoginSuccess() {
-  OnStateChanged();
-}
-
-void PersonalOptionsHandler::OnLoginFailure(
-    const GoogleServiceAuthError& error) {
-  OnStateChanged();
-}
-
 void PersonalOptionsHandler::ObserveThemeChanged() {
   Profile* profile = Profile::FromWebUI(web_ui_);
 #if defined(TOOLKIT_GTK)
   GtkThemeService* theme_service = GtkThemeService::GetFrom(profile);
   bool is_gtk_theme = theme_service->UsingNativeTheme();
   base::FundamentalValue gtk_enabled(!is_gtk_theme);
   web_ui_->CallJavascriptFunction(
       "options.PersonalOptions.setGtkThemeButtonEnabled", gtk_enabled);
 #else
   ThemeService* theme_service = ThemeServiceFactory::GetForProfile(profile);
@@ skipping 86 matching lines @@
   }
 
   web_ui_->CallJavascriptFunction("PersonalOptions.setProfilesInfo",
                                   profile_info_list);
 }
 
 void PersonalOptionsHandler::CreateProfile(const ListValue* args) {
   ProfileManager::CreateMultiProfileAsync();
 }