Track when and how a profile is signed out via UMA.

chrome/browser/signin/account_reconcilor_unittest.cc

 // Copyright 2013 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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
@@ skipping 206 matching lines @@
       AccountReconcilorFactory::GetForProfile(profile());
   ASSERT_TRUE(reconcilor);
   ASSERT_FALSE(reconcilor->IsRegisteredWithTokenService());
 
   signin_manager()->set_password("password");
   signin_manager()->OnExternalSigninCompleted(kTestEmail);
   ASSERT_TRUE(reconcilor->IsRegisteredWithTokenService());
 
   EXPECT_CALL(*GetMockReconcilor(), PerformLogoutAllAccountsAction());
 
-  signin_manager()->SignOut();
+  signin_manager()->SignOut(signin_metrics::SIGNOUT_TEST);
   ASSERT_FALSE(reconcilor->IsRegisteredWithTokenService());
 }
 
 // This method requires the use of the |TestSigninClient| to be created from the
 // |ChromeSigninClientFactory| because it overrides the |GoogleSigninSucceeded|
 // method with an empty implementation. On MacOS, the normal implementation
 // causes the try_bots to time out.
 TEST_F(AccountReconcilorTest, Reauth) {
   signin_manager()->SetAuthenticatedUsername(kTestEmail);
   signin_manager()->set_password("password");
@@ skipping 519 matching lines @@
 
   base::RunLoop().RunUntilIdle();
   SimulateMergeSessionCompleted(reconcilor, "user@gmail.com",
                                 GoogleServiceAuthError::AuthErrorNone());
   ASSERT_FALSE(reconcilor->is_reconcile_started_);
 }
 
 INSTANTIATE_TEST_CASE_P(AccountReconcilorMaybeEnabled,
                         AccountReconcilorTest,
                         testing::Bool());