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

chrome/browser/ui/webui/signin/login_ui_service.cc

Index: chrome/browser/ui/webui/signin/login_ui_service.cc
diff --git a/chrome/browser/ui/webui/signin/login_ui_service.cc b/chrome/browser/ui/webui/signin/login_ui_service.cc
index cc1681d66027c04f8863d29436ae2f59706e142c..a18642d8a8f3550ba7ea8a59e0eda4d4532c242e 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.cc
+++ b/chrome/browser/ui/webui/signin/login_ui_service.cc
@@ -67,8 +67,8 @@ void LoginUIService::ShowLoginPopup() {
 #else
   chrome::ScopedTabbedBrowserDisplayer displayer(
       profile_, chrome::GetActiveDesktop());
-  chrome::ShowBrowserSignin(
-      displayer.browser(), signin_metrics::SOURCE_APP_LAUNCHER);
+  chrome::ShowBrowserSignin(displayer.browser(),
+                            signin_metrics::ACCESS_POINT_EXTENSIONS);
 #endif
 }
 
@@ -80,9 +80,9 @@ void LoginUIService::DisplayLoginResult(Browser* browser,
 #endif
   last_login_result_ = message;
   browser->window()->ShowAvatarBubbleFromAvatarButton(
-      message.empty() ? BrowserWindow::AVATAR_BUBBLE_MODE_CONFIRM_SIGNIN :
-                        BrowserWindow::AVATAR_BUBBLE_MODE_SHOW_ERROR,
-      signin::ManageAccountsParams());
+      message.empty() ? BrowserWindow::AVATAR_BUBBLE_MODE_CONFIRM_SIGNIN
+                      : BrowserWindow::AVATAR_BUBBLE_MODE_SHOW_ERROR,
+      signin::ManageAccountsParams(), signin_metrics::ACCESS_POINT_EXTENSIONS);
 }
 
 const base::string16& LoginUIService::GetLastLoginResult() {