Adding a histrogram to track account missmatch for signin reauth.

chrome/browser/ui/sync/one_click_signin_helper.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/sync/one_click_signin_helper.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 #include <vector>
@@ skipping 25 matching lines @@
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/sync/sync_prefs.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/sync/one_click_signin_histogram.h"
 #include "chrome/browser/ui/sync/one_click_signin_infobar_delegate.h"
 #include "chrome/browser/ui/sync/one_click_signin_sync_starter.h"
+#include "chrome/browser/ui/sync/signin_histogram.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/net/url_util.h"
 #include "chrome/common/one_click_signin_messages.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 495 matching lines @@
         SigninManagerFactory::GetForProfile(profile);
     if (!manager)
       return false;
 
     // If the signin manager already has an authenticated name, then this is a
     // re-auth scenario.  Make sure the email just signed in corresponds to the
     // the one sign in manager expects.
     std::string current_email = manager->GetAuthenticatedUsername();
     const bool same_email = gaia::AreEmailsSame(current_email, email);
     if (!current_email.empty() && !same_email) {
+      UMA_HISTOGRAM_ENUMERATION("Signin.Reauth",
+                                signin::HISTOGRAM_ACCOUNT_MISSMATCH,
+                                signin::HISTOGRAM_MAX);
       if (error_message) {
         error_message->assign(
             l10n_util::GetStringFUTF8(IDS_SYNC_WRONG_EMAIL,
                                       UTF8ToUTF16(current_email)));
       }
       return false;
     }
 
     // Make sure this username is not prohibited by policy.
     if (!manager->IsAllowedUsername(email)) {
@@ skipping 596 matching lines @@
         break;
     }
   }
 
   RedirectToNTP();
 }
 
 void OneClickSigninHelper::SigninSuccess() {
   RedirectToNTP();
 }