Show non-incognito browser in front of incognito browser when signing in from bookmark bubble.

chrome/browser/ui/bookmarks/bookmark_bubble_sign_in_delegate.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/ui/bookmarks/bookmark_bubble_sign_in_delegate.h"
 
 #include "chrome/browser/signin/signin_promo.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 
 BookmarkBubbleSignInDelegate::BookmarkBubbleSignInDelegate(Browser* browser)
     : browser_(browser),
       profile_(browser->profile()),
       desktop_type_(browser->host_desktop_type()) {
   BrowserList::AddObserver(this);
 }
 
 BookmarkBubbleSignInDelegate::~BookmarkBubbleSignInDelegate() {
   BrowserList::RemoveObserver(this);
 }
 
 void BookmarkBubbleSignInDelegate::OnSignInLinkClicked() {
   EnsureBrowser();
   chrome::ShowBrowserSignin(browser_, signin::SOURCE_BOOKMARK_BUBBLE);
-  DCHECK(!browser_->tab_strip_model()->empty());
-  browser_->window()->Show();
 }
 
 void BookmarkBubbleSignInDelegate::OnBrowserRemoved(Browser* browser) {
   if (browser == browser_)
     browser_ = NULL;
 }
 
 void BookmarkBubbleSignInDelegate::EnsureBrowser() {
   if (!browser_) {
     Profile* original_profile = profile_->GetOriginalProfile();
     browser_ = chrome::FindLastActiveWithProfile(original_profile,
                                                  desktop_type_);
     if (!browser_) {
       browser_ = new Browser(Browser::CreateParams(original_profile,
                                                    desktop_type_));
     }
   }
 }