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

components/signin/core/browser/signin_manager.h

 // Copyright 2014 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.
 //
 // The signin manager encapsulates some functionality tracking
 // which user is signed in. See SigninManagerBase for full description of
 // responsibilities. The class defined in this file provides functionality
 // required by all platforms except Chrome OS.
 //
 // When a user is signed in, a ClientLogin request is run on their behalf.
@@ skipping 16 matching lines @@
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/prefs/pref_member.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/signin/core/browser/signin_internals_util.h"
 #include "components/signin/core/browser/signin_manager_base.h"
+#include "components/signin/core/browser/signin_metrics.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "google_apis/gaia/merge_session_helper.h"
 #include "net/cookies/canonical_cookie.h"
 
 class PrefService;
 class ProfileOAuth2TokenService;
 class SigninAccountIdHelper;
 class SigninClient;
 
 class SigninManager : public SigninManagerBase {
@@ skipping 33 matching lines @@
       const std::string& password,
       const OAuthTokenFetchedCallback& oauth_fetched_callback);
 
   // Copies auth credentials from one SigninManager to this one. This is used
   // when creating a new profile during the signin process to transfer the
   // in-progress credentials to the new profile.
   virtual void CopyCredentialsFrom(const SigninManager& source);
 
   // Sign a user out, removing the preference, erasing all keys
   // associated with the user, and canceling all auth in progress.
-  virtual void SignOut();
+  virtual void SignOut(signin_metrics::ProfileSignout signout_source_metric);
 
   // On platforms where SigninManager is responsible for dealing with
   // invalid username policy updates, we need to check this during
   // initialization and sign the user out.
   virtual void Initialize(PrefService* local_state) OVERRIDE;
   virtual void Shutdown() OVERRIDE;
 
   // Invoked from an OAuthTokenFetchedCallback to complete user signin.
   virtual void CompletePendingSignin();
 
@@ skipping 110 matching lines @@
 
   // Helper to merge signed in account into the content area.
   scoped_ptr<MergeSessionHelper> merge_session_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninManager);
 };
 
 #endif  // !defined(OS_CHROMEOS)
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_MANAGER_H_