Fetch OAuth2 tokens prior to profile creation.

chrome/browser/chromeos/login/existing_user_controller.h

Index: chrome/browser/chromeos/login/existing_user_controller.h
diff --git a/chrome/browser/chromeos/login/existing_user_controller.h b/chrome/browser/chromeos/login/existing_user_controller.h
index c7953818da793bff55b0476fc870e35ba8939b57..0eb01b89eade16b911f5c5776b7896a3cdd45e4e 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.h
+++ b/chrome/browser/chromeos/login/existing_user_controller.h
@@ -38,6 +38,7 @@ namespace chromeos {
 class BootstrapUserContextInitializer;
 class CrosSettings;
 class LoginDisplayHost;
+class OAuth2TokenInitializer;
 
 namespace login {
 class NetworkStateHelper;
@@ -238,6 +239,9 @@ class ExistingUserController : public LoginDisplay::Delegate,
   void OnBootstrapUserContextInitialized(bool success,
                                          const UserContext& user_context);
 
+  // Callback invoked when |oauth2_token_initializer_| has finished.
+  void OnOAuth2TokensFetched(bool success, const UserContext& user_context);
+
   // Public session auto-login timer.
   scoped_ptr<base::OneShotTimer<ExistingUserController> > auto_login_timer_;
 
@@ -325,6 +329,8 @@ class ExistingUserController : public LoginDisplay::Delegate,
   scoped_ptr<BootstrapUserContextInitializer>
       bootstrap_user_context_initializer_;
 
+  scoped_ptr<OAuth2TokenInitializer> oauth2_token_initializer_;
+
   FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerTest, ExistingUserLogin);
 
   // Factory of callbacks.