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

chrome/browser/ui/auto_login_prompter.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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/android/infobars/auto_login_prompter.h"
+#include "chrome/browser/ui/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;
 
+namespace {
+
+#if !defined(OS_ANDROID)
+bool FetchUsernameThroughSigninManager(Profile* profile, std::string* output) {
+  // In an incognito window these services are not available.
+  SigninManagerBase* signin_manager =
+      SigninManagerFactory::GetInstance()->GetForProfile(profile);
+  if (!signin_manager)
+    return false;
+
+  ProfileOAuth2TokenService* token_service =
+      ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
+  if (!token_service || !token_service->RefreshTokenIsAvailable(
+      signin_manager->GetAuthenticatedAccountId())) {
+    return false;
+  }
+
+  *output = signin_manager->GetAuthenticatedUsername();
+  return true;
+}
+#endif  // !defined(OS_ANDROID)
+
+}  // namespace
+
 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) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableAutologin))
+      return;
+
   // 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(
@@ skipping 12 matching lines @@
   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;
 
+#if !defined(OS_ANDROID)
+  // On Android, the username is fetched on the Java side from the
+  // AccountManager provided by the platform.
+  if (!FetchUsernameThroughSigninManager(profile, &params.username))
+    return;
+#endif
+
   // 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_);
 }