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

chrome/browser/extensions/api/principals_private/principals_private_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/principals_private/principals_private_api.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/avatar_menu.h"
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 18 matching lines @@
     profiles::LockProfile(browser->profile());
   }
   return true;
 }
 
 bool PrincipalsPrivateShowAvatarBubbleFunction::RunSyncSafe() {
   Browser* browser = GetCurrentBrowser();
   if (browser) {
     browser->window()->ShowAvatarBubbleFromAvatarButton(
         BrowserWindow::AVATAR_BUBBLE_MODE_ACCOUNT_MANAGEMENT,
-        signin::ManageAccountsParams());
+        signin::ManageAccountsParams(),
+        signin_metrics::ACCESS_POINT_AVATAR_BUBBLE_SIGN_IN);

[Roger Tawa OOO till Jul 10th, 2015/12/02 20:33:48]

This does not seem like the right access point.

[gogerald1, 2015/12/03 17:49:03]

Use signin_metrics::ACCESS_POINT_AVATAR_BUBBLE_SIGN_IN here since it will bring
out sign in avatar bubble instead of Gaia sign in page as as we discussed. 

   }
   return true;
 }
 
 }  // namespace extensions