Adding a histrogram to track account missmatch for signin reauth.

chrome/browser/ui/sync/one_click_signin_helper.cc

Index: chrome/browser/ui/sync/one_click_signin_helper.cc
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.cc b/chrome/browser/ui/sync/one_click_signin_helper.cc
index 68430ce9b84184f148a026c2fe6224dc12631fc7..03ac9802ba089395641a7e7c2090c99f9cbbbf74 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.cc
+++ b/chrome/browser/ui/sync/one_click_signin_helper.cc
@@ -43,6 +43,7 @@
 #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"
@@ -568,6 +569,9 @@ bool OneClickSigninHelper::CanOffer(content::WebContents* web_contents,
 
     // Make sure this username is not prohibited by policy.
     if (!manager->IsAllowedUsername(email)) {
+      UMA_HISTOGRAM_ENUMERATION("Signin.Reauth",
+                                signin::HISTOGRAM_ACCOUNT_MISSMATCH,
+                                signin::HISTOGRAM_MAX);

[jwd, 2013/02/20 22:41:27]

Oh wow, this is totally wrong!

       if (error_message) {
         error_message->assign(
             l10n_util::GetStringUTF8(IDS_SYNC_LOGIN_NAME_PROHIBITED));