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

chrome/browser/ui/browser_window.h

Index: chrome/browser/ui/browser_window.h
diff --git a/chrome/browser/ui/browser_window.h b/chrome/browser/ui/browser_window.h
index b41962f40e837794bf0813a1b8b50d08fffa01cc..029549201127dfbfa0aded054f495dad5a77cc26 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -17,6 +17,7 @@
 #include "chrome/browser/ui/sync/one_click_signin_sync_starter.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/signin/core/browser/signin_header_helper.h"
+#include "components/signin/core/browser/signin_metrics.h"
 #include "components/translate/core/common/translate_errors.h"
 #include "ui/base/base_window.h"
 #include "ui/base/window_open_disposition.h"
@@ -374,6 +375,8 @@ class BrowserWindow : public ui::BaseWindow {
 
   // Shows the avatar bubble on the window frame off of the avatar button with
   // the given mode. The Service Type specified by GAIA is provided as well.
+  // |access_point| specifies the access point used to open the Gaia sign in
+  // page.
   enum AvatarBubbleMode {
     AVATAR_BUBBLE_MODE_DEFAULT,
     AVATAR_BUBBLE_MODE_ACCOUNT_MANAGEMENT,
@@ -384,8 +387,10 @@ class BrowserWindow : public ui::BaseWindow {
     AVATAR_BUBBLE_MODE_SHOW_ERROR,
     AVATAR_BUBBLE_MODE_FAST_USER_SWITCH,
   };
-  virtual void ShowAvatarBubbleFromAvatarButton(AvatarBubbleMode mode,
-      const signin::ManageAccountsParams& manage_accounts_params) = 0;
+  virtual void ShowAvatarBubbleFromAvatarButton(
+      AvatarBubbleMode mode,
+      const signin::ManageAccountsParams& manage_accounts_params,
+      signin_metrics::AccessPoint access_point) = 0;
 
   // Returns the height inset for RenderView when detached bookmark bar is
   // shown.  Invoked when a new RenderHostView is created for a non-NTP