[signin] Support for CrOS and OAuth2AccessTokenConsumer services.

chrome/browser/signin/signin_manager.cc

Index: chrome/browser/signin/signin_manager.cc
diff --git a/chrome/browser/signin/signin_manager.cc b/chrome/browser/signin/signin_manager.cc
index 47cbed0ef7a4c396dec96b75e269b647713fd19b..f3ea968a1f8b6d668d94ebe71668b22c35e584a6 100644
--- a/chrome/browser/signin/signin_manager.cc
+++ b/chrome/browser/signin/signin_manager.cc
@@ -281,6 +281,10 @@ void SigninManager::ProvideSecondFactorAccessCode(
       last_result_.data.empty());
   DCHECK(type_ == SIGNIN_TYPE_CLIENT_LOGIN);
 
+  NotifyDiagnosticsObservers(SIGNIN_TYPE,
+                             SigninTypeToString(SIGNIN_TYPE_CLIENT_LOGIN)
+                             + "(with two factor authentication)");
+
   client_login_.reset(new GaiaAuthFetcher(this,
                                           GaiaConstants::kChromeSource,
                                           profile_->GetRequestContext()));