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

chrome/browser/ui/browser_mac.cc

Index: chrome/browser/ui/browser_mac.cc
diff --git a/chrome/browser/ui/browser_mac.cc b/chrome/browser/ui/browser_mac.cc
index 96068352ae5952846d144e8dc27f96b578f27b35..05f1a636bf230cf76290017786171e490f0e6ed3 100644
--- a/chrome/browser/ui/browser_mac.cc
+++ b/chrome/browser/ui/browser_mac.cc
@@ -51,11 +51,12 @@ void OpenOptionsWindow(Profile* profile) {
   browser->window()->Show();
 }
 
-void OpenSyncSetupWindow(Profile* profile, signin_metrics::Source source) {
+void OpenSyncSetupWindow(Profile* profile,
+                         signin_metrics::AccessPoint access_point) {
   Browser* browser =
       new Browser(Browser::CreateParams(profile,
                                         chrome::HOST_DESKTOP_TYPE_NATIVE));
-  ShowBrowserSigninOrSettings(browser, source);
+  ShowBrowserSigninOrSettings(browser, access_point);
   browser->window()->Show();
 }