The Apps ntp page should not display an avatar menu when clicking on the username.

chrome/browser/ui/browser_window.h

 // Copyright 2012 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_BROWSER_WINDOW_H_
 #define CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 
 #include "base/callback_forward.h"
 #include "chrome/browser/lifetime/browser_close_manager.h"
 #include "chrome/browser/signin/signin_header_helper.h"
@@ skipping 340 matching lines @@
 
   // Construct a BrowserWindow implementation for the specified |browser|.
   static BrowserWindow* CreateBrowserWindow(Browser* browser);
 
   // Returns a HostDesktopType that is compatible with the current Chrome window
   // configuration. On Windows with Ash, this is always HOST_DESKTOP_TYPE_ASH
   // while Chrome is running in Metro mode. Otherwise returns |desktop_type|.
   static chrome::HostDesktopType AdjustHostDesktopType(
       chrome::HostDesktopType desktop_type);
 
-  // Shows the avatar bubble inside |web_contents|. The bubble is positioned
-  // relative to |rect|. |rect| should be in the |web_contents| coordinate
-  // system.
-  virtual void ShowAvatarBubble(content::WebContents* web_contents,
-                                const gfx::Rect& rect) = 0;
-
   // 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.
   enum AvatarBubbleMode {
     AVATAR_BUBBLE_MODE_DEFAULT,
     AVATAR_BUBBLE_MODE_ACCOUNT_MANAGEMENT,
     AVATAR_BUBBLE_MODE_SIGNIN,
     AVATAR_BUBBLE_MODE_ADD_ACCOUNT,
     AVATAR_BUBBLE_MODE_REAUTH,
     AVATAR_BUBBLE_MODE_CONFIRM_SIGNIN,
     AVATAR_BUBBLE_MODE_SHOW_ERROR,
@@ skipping 10 matching lines @@
   virtual void ExecuteExtensionCommand(const extensions::Extension* extension,
                                        const extensions::Command& command) = 0;
 
  protected:
   friend class BrowserCloseManager;
   friend class BrowserView;
   virtual void DestroyBrowser() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_H_