Revert "Remove desktop auto-login since we don't plan on shipping it there. Refactor the base and …

chrome/browser/ui/android/infobars/auto_login_prompter.cc

-// Copyright 2014 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/android/infobars/auto_login_prompter.h"
-
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/google/google_url_tracker.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
-#include "chrome/browser/signin/signin_manager.h"
-#include "chrome/browser/signin/signin_manager_factory.h"
-#include "chrome/browser/tab_contents/tab_util.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "components/auto_login_parser/auto_login_parser.h"
-#include "components/signin/core/profile_oauth2_token_service.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/web_contents.h"
-#include "net/url_request/url_request.h"
-#include "url/gurl.h"
-
-using content::BrowserThread;
-using content::WebContents;
-
-AutoLoginPrompter::AutoLoginPrompter(WebContents* web_contents,
-                                     const Params& params,
-                                     const GURL& url)
-    : WebContentsObserver(web_contents),
-      params_(params),
-      url_(url),
-      infobar_shown_(false) {
-  if (!web_contents->IsLoading()) {
-    // If the WebContents isn't loading a page, the load notification will never
-    // be triggered.  Try adding the InfoBar now.
-    AddInfoBarToWebContents();
-  }
-}
-
-AutoLoginPrompter::~AutoLoginPrompter() {
-}
-
-// static
-void AutoLoginPrompter::ShowInfoBarIfPossible(net::URLRequest* request,
-                                              int child_id,
-                                              int route_id) {
-  // See if the response contains the X-Auto-Login header.  If so, this was
-  // a request for a login page, and the server is allowing the browser to
-  // suggest auto-login, if available.
-  Params params;
-  // Currently we only accept GAIA credentials in Chrome.
-  if (!auto_login_parser::ParserHeaderInResponse(
-          request, auto_login_parser::ONLY_GOOGLE_COM, &params.header))
-    return;
-
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&ShowInfoBarUIThread,
-                 params, request->url(), child_id, route_id));
-}
-
-
-// static
-void AutoLoginPrompter::ShowInfoBarUIThread(Params params,
-                                            const GURL& url,
-                                            int child_id,
-                                            int route_id) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  WebContents* web_contents = tab_util::GetWebContentsByID(child_id, route_id);
-  if (!web_contents)
-    return;
-
-  Profile* profile =
-      Profile::FromBrowserContext(web_contents->GetBrowserContext());
-
-  if (!profile->GetPrefs()->GetBoolean(prefs::kAutologinEnabled))
-    return;
-
-  // Make sure that |account|, if specified, matches the logged in user.
-  // However, |account| is usually empty.
-  if (!params.username.empty() && !params.header.account.empty() &&
-      params.username != params.header.account)
-    return;
-  // We can't add the infobar just yet, since we need to wait for the tab to
-  // finish loading.  If we don't, the info bar appears and then disappears
-  // immediately.  Create an AutoLoginPrompter instance to listen for the
-  // relevant notifications; it will delete itself.
-  new AutoLoginPrompter(web_contents, params, url);
-}
-
-void AutoLoginPrompter::DidStopLoading(
-    content::RenderViewHost* render_view_host) {
-  AddInfoBarToWebContents();
-  delete this;
-}
-
-void AutoLoginPrompter::WebContentsDestroyed(WebContents* web_contents) {
-  // The WebContents was destroyed before the navigation completed.
-  delete this;
-}
-
-void AutoLoginPrompter::AddInfoBarToWebContents() {
-  if (!infobar_shown_)
-    infobar_shown_ = AutoLoginInfoBarDelegate::Create(web_contents(), params_);
-}