Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/ui/auto_login_prompter.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/auto_login_prompter.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
@@ skipping 11 matching lines @@
 #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(
           token_service->GetPrimaryAccountId())) {
     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) {
@@ skipping 81 matching lines @@
     return;
 
   InfoBarService* infobar_service =
       InfoBarService::FromWebContents(web_contents());
   // |infobar_service| is NULL for WebContents hosted in WebDialog.
   if (infobar_service) {
     AutoLoginInfoBarDelegate::Create(infobar_service, params_);
     infobar_shown_ = true;
   }
 }