Implement newly designed sign-in related histograms for desktop platorms.

chrome/browser/ui/webui/signin/inline_login_handler_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_HANDLER_IMPL_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_HANDLER_IMPL_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 152 matching lines @@
       bool confirm_untrusted_signin);
   ~InlineSigninHelper() override;
 
  private:
   // Handles cross account sign in error. If the supplied |email| does not match
   // the last signed in email of the current profile, then Chrome will show a
   // confirmation dialog before starting sync. It returns true if there is a
   // cross account error, and false otherwise.
   bool HandleCrossAccountError(
       const std::string& refresh_token,
-      signin_metrics::Source source,
       OneClickSigninSyncStarter::ConfirmationRequired confirmation_required,
       OneClickSigninSyncStarter::StartSyncMode start_mode);
 
   // Callback used with ConfirmEmailDialogDelegate.
   void ConfirmEmailAction(
       content::WebContents* web_contents,
       const std::string& refresh_token,
-      signin_metrics::Source source,
       OneClickSigninSyncStarter::ConfirmationRequired confirmation_required,
       OneClickSigninSyncStarter::StartSyncMode start_mode,
       Action action);
 
   // Overridden from GaiaAuthConsumer.
   void OnClientOAuthSuccess(const ClientOAuthResult& result) override;
   void OnClientOAuthFailure(const GoogleServiceAuthError& error)
       override;
 
   // Creates the sync starter.  Virtual for tests. Call to exchange oauth code
@@ skipping 15 matching lines @@
   std::string password_;
   std::string session_index_;
   std::string auth_code_;
   bool choose_what_to_sync_;
   bool confirm_untrusted_signin_;
 
   DISALLOW_COPY_AND_ASSIGN(InlineSigninHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_HANDLER_IMPL_H_