[ChromeOS] Reland - Make WebUI login use only needed resources.

chrome/browser/ui/webui/chromeos/login/login_ui.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/chromeos/login/login_ui.h"
-
-#include "base/memory/ref_counted_memory.h"
-#include "base/values.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
-#include "chrome/browser/ui/webui/chromeos/login/login_ui_helpers.h"
-#include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
-#include "chrome/browser/ui/webui/options/chromeos/user_image_source.h"
-#include "chrome/browser/ui/webui/theme_source.h"
-#include "chrome/common/url_constants.h"
-#include "content/browser/tab_contents/tab_contents.h"
-
-namespace chromeos {
-
-// Boilerplate class that is used to associate the LoginUI code with the URL
-// "chrome://login"
-class LoginUIHTMLSource : public ChromeURLDataManager::DataSource {
- public:
-  explicit LoginUIHTMLSource(base::DictionaryValue* localized_strings);
-  virtual ~LoginUIHTMLSource();
-
-  virtual void StartDataRequest(const std::string& path,
-                                bool is_incognito,
-                                int request_id);
-  virtual std::string GetMimeType(const std::string&) const;
-
- private:
-  scoped_ptr<HTMLOperationsInterface> html_operations_;
-  scoped_ptr<DictionaryValue> localized_strings_;
-
-  DISALLOW_COPY_AND_ASSIGN(LoginUIHTMLSource);
-};
-
-// LoginUIHTMLSource, public: --------------------------------------------------
-
-LoginUIHTMLSource::LoginUIHTMLSource(base::DictionaryValue* localized_strings)
-    : DataSource(chrome::kChromeUILoginHost, MessageLoop::current()),
-      html_operations_(new HTMLOperationsInterface()),
-      localized_strings_(localized_strings) {
-}
-
-LoginUIHTMLSource::~LoginUIHTMLSource() {
-}
-
-void LoginUIHTMLSource::StartDataRequest(const std::string& path,
-                                         bool is_incognito,
-                                         int request_id) {
-  SetFontAndTextDirection(localized_strings_.get());
-
-  base::StringPiece login_html = html_operations_->GetLoginHTML();
-  std::string full_html = html_operations_->GetFullHTML(
-      login_html, localized_strings_.get());
-
-  SendResponse(request_id, base::RefCountedString::TakeString(&full_html));
-}
-
-std::string LoginUIHTMLSource::GetMimeType(const std::string&) const {
-  return "text/html";
-}
-
-// LoginUI, public: ------------------------------------------------------------
-
-LoginUI::LoginUI(TabContents* contents)
-    : ChromeWebUI(contents) {
-  scoped_ptr<base::DictionaryValue> localized_strings(
-      new base::DictionaryValue);
-
-  BaseScreenHandler* signin_screen_handler = new SigninScreenHandler;
-  AddMessageHandler(signin_screen_handler->Attach(this));
-  signin_screen_handler->GetLocalizedStrings(localized_strings.get());
-
-  Profile* profile = Profile::FromBrowserContext(contents->browser_context());
-  LoginUIHTMLSource* html_source =
-      new LoginUIHTMLSource(localized_strings.release());
-  profile->GetChromeURLDataManager()->AddDataSource(html_source);
-
-  // Load the theme URLs.
-  ThemeSource* theme = new ThemeSource(profile);
-  profile->GetChromeURLDataManager()->AddDataSource(theme);
-
-  // Load the user-image URLs
-  // Set up the chrome://userimage/ source.
-  chromeos::UserImageSource* user_image_source =
-      new chromeos::UserImageSource();
-  profile->GetChromeURLDataManager()->AddDataSource(user_image_source);
-}
-
-}  // namespace chromeos